Name: Scotcharoo Popcorn
Prep time: 10 min
Cook time: 5 min
Total time: 60 min
Ingredients: 8 cups plain popped popcorn; ½ cup light corn syrup; ½ cup granulated sugar; ½ cup creamy peanut butter; ¼ teaspoon fine sea salt; ½ cup semisweet chocolate chips; ⅓ cup butterscotch chips

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Scotcharoo Popcorn has crisp popcorn at the center, a chewy peanut butter coating, and streaks of chocolate and butterscotch over the top. A few kernels stick together as the candy sets, so you get clusters with extra chocolate tucked into the ridges. If you like the corner pieces of a pan of scotcheroos, those are the pieces to look for.

Classic scotcheroos are chewy peanut butter cereal bars with a chocolate-butterscotch topping. This recipe uses plain popcorn in place of the crisp rice cereal, so the clusters are light enough to snack on by the handful. The peanut butter syrup cooks in one saucepan, the topping melts in a bowl, and everything sets on a sheet pan at room temperature. The active work takes about 15 minutes once you have your popcorn ready.

Ingredients for Peanut Butter Popcorn Clusters

8 cups plain popped popcorn. Measure it after popping, loosely scooping the cups without packing them. Air-popped popcorn, plain bagged popcorn, or unflavored microwave popcorn all work. Starting with unsalted popcorn gives you control over the seasoning. If you’re popping kernels for the recipe, about ⅓ cup unpopped kernels should give you enough, with the exact amount depending on how well they pop.

½ cup light corn syrup. This helps the sugar cook into a smooth coating that stays chewy once it cools. Light corn syrup also keeps the flavor mild enough for the peanut butter and butterscotch to come through. A thin film of neutral cooking spray inside the measuring cup helps the syrup slide into the pan.
½ cup granulated sugar. Plain white sugar dissolves into the corn syrup and gives the peanut butter coating enough body to hold small clusters together. Level the measuring cup. An extra scoop of sugar can make the coating thicker and harder to spread across the popcorn.

½ cup creamy peanut butter. Use the smooth kind that stays blended in the jar. It stirs quickly into the hot syrup and coats the popcorn evenly. A jar with a layer of oil on top can give the candy a greasy finish, especially if the oil and peanut solids are still unevenly mixed.
¼ teaspoon fine sea salt. A small amount in the syrup brings out the roasted peanut flavor. Fine salt disperses through the coating. If your popcorn already has a visible dusting of salt, you can leave the added salt out.

½ cup semisweet chocolate chips. Semisweet chocolate gives the topping a cocoa flavor that holds its own next to the sweeter butterscotch chips. The melted chocolate also helps the drizzle firm up enough to handle once the popcorn cools.
⅓ cup butterscotch chips. These bring the brown sugar flavor you expect from a scotcheroo. Melt them with the semisweet chips to make one drizzle. The mixture is thicker than melted chocolate alone, so a spoon works well for laying it over the popcorn.

Get the Popcorn and Pan Ready

Use a large mixing bowl with room to lift the popcorn from the bottom without scattering it across the counter. A 5-quart bowl gives you enough space. Line a rimmed 13-by-18-inch sheet pan with parchment and set it beside the bowl. Two smaller parchment-lined pans are fine if that’s what fits on your counter.

To remove the hard kernels, shake the bowl of freshly popped corn a couple of times. Whole kernels and small, partly popped pieces tend to fall to the bottom. Lift the fluffy pieces into your mixing bowl by the handful and leave the hard bits behind. This is especially helpful for a gift batch, since an unpopped kernel can be hard to spot once it has a coat of peanut butter.

Measure the peanut butter and salt before you turn on the stove. Have a flexible spatula handy and set out a dry bowl for the topping. Once the syrup starts to bubble, the peanut butter goes in right away, while the mixture is still hot enough to stir smoothly.

How to Make Scotcharoo Popcorn

1. Heat the sugar and corn syrup

Put the sugar and corn syrup in a heavy 2-quart saucepan over medium heat. Stir slowly with a heatproof spatula, sweeping across the bottom and around the edge as the syrup loosens. It starts out cloudy. As the sugar dissolves, the mixture looks more even and flows off the spatula in a thick ribbon.

Watch for the first steady bubbles to break through the center, usually after about 3 to 4 minutes. Take the pan off the heat at that point. A small ring of bubbles at the edge can show up before the sugar has dissolved, so give the center a moment to catch up. A long boil makes the finished coating firmer and gives you less time to toss the popcorn.

2. Stir in the peanut butter and coat the popcorn

Add the peanut butter and salt to the saucepan off the heat. Stir until the mixture is smooth and you can see the same tan color from the center to the sides. It’ll smell like warm peanut butter as soon as it hits the pan.

Pour about half the warm coating over the popcorn, moving the saucepan as you pour. Lift and fold the popcorn a few times, then add the rest and fold again. Reach all the way down to the bottom of the bowl on each pass. Turn the bowl as you fold to catch any syrup that pools on one side. A little white showing through the coating is fine.

3. Spread the popcorn out

Tip the popcorn onto the parchment as soon as it’s coated. Use the spatula to spread it into a loose layer, breaking up any mound that’s larger than a few bites. Leave a few kernels touching here and there so they hold together in small clusters.

The first few minutes on the pan give the peanut butter coating time to settle while you melt the chips. If the layer looks thick in the center, push some popcorn toward the edges. A mostly even layer lets you drizzle all the way across the tray and keeps the bottom pieces from being buried.

4. Melt and drizzle the topping

Put both kinds of chips in the dry microwave-safe bowl. Heat for 30 seconds, stir, and continue in 15-second bursts, stirring well after each one. As the chips soften, mash them against the bowl with the back of the spoon. Stop heating when a few soft bits remain and stir until the bowl’s residual heat melts them.

Spoon the topping over the tray in short ribbons, moving side to side to catch the edges as well as the middle. Give the spoon a small shake over any bare patch. Some stripes will be thin and others will pool where two pieces meet. Those little pools are what give a cluster a thicker bite of chocolate after it sets.

5. Let the clusters set

Leave the tray at room temperature for about 45 minutes. To check it, lift a cluster from the edge and touch the thickest part of the drizzle. It should feel firm and come away cleanly from your fingertip. The peanut butter layer underneath will still have a little give.

Once the topping is firm, lift the clusters off the parchment and break any large pieces along the gaps between kernels. A warm kitchen can add to the setting time. If you’re in a hurry, give the tray 10 to 15 minutes in the refrigerator after the syrup has cooled, then let the clusters come back to room temperature before packing them.

What to Do If the Coating Gives You Trouble

The peanut butter coating feels sandy. Dip the spatula into the syrup before you add the peanut butter and look for visible sugar grains. If the syrup is still heating and you see grains on the spatula, stir gently until they’re gone and the syrup reaches its first steady bubbles. Sugar that dries high on the sides of the pan can also give the coating a gritty texture. Keep your stirring low in the pan so those dry streaks stay out of the syrup.

The coating is thick in the bowl. Pouring the syrup over a broad area and folding in two passes makes it easier to distribute. If it starts to stiffen as you’re mixing, get the popcorn onto the sheet pan while you can still spread it. Use the spatula to separate the larger piles. You may get a few clusters with heavier coating, which break apart easily once the topping is set.

The topping looks lumpy. A warm chip can hold its shape long after it has softened. Press one against the side of the bowl. If it smears easily, keep stirring for a few seconds. If it still feels solid, heat in another short burst. When the mixture has a thick but smooth texture, use a spoon to drop smaller amounts across the pan. Keep the spoon and bowl dry, since a little water can make the melted chips clump.

The popcorn has lost its crunch. Check the plain popcorn before you start. It should feel dry and crisp, especially if you’ve just opened a microwave bag full of steam. Spread freshly popped corn out briefly if it feels damp. Once you’ve added the coating, give the clusters space on the pan and cool them fully before closing the container. This style of popcorn has a chewy finish around the kernels, like the cereal bars that inspired it.

Variations for a Sweet and Salty Batch

Add pretzels. Use 7 cups of popcorn and 1 cup of broken mini pretzels. Pieces about an inch long are easy to scoop and catch in the syrup. Fold the popcorn and pretzels together before pouring the coating so the heavier pieces are spread out from the start. If the pretzels are heavily salted, skip the salt in the syrup.

Add roasted peanuts. Toss ½ cup dry-roasted unsalted peanuts with the 8 cups of popcorn before coating. The whole peanuts settle quickly, so scrape the bottom of the bowl on the last fold and use the spatula to spread them back over the tray. This is a good variation if you want a firmer crunch among the popcorn pieces.

Make a darker drizzle. Swap the semisweet chips for ½ cup bittersweet chocolate chips and keep the ⅓ cup of butterscotch chips. The darker chocolate makes the finish a little less sweet, especially in those larger clusters where the topping collects. For a batch with a milder cocoa flavor, use milk chocolate chips in the same amount.

How to Store and Pack the Clusters

Store the cooled clusters in an airtight container at room temperature and enjoy them within 3 days for the best texture. A wide container makes it easy to pack them without crushing the popcorn. If the pieces are sticky enough to catch on each other, lay a sheet of parchment between layers. Keep the container somewhere cool and dry, away from the stove or a sunny window.

For a party, make the popcorn a day ahead. Let it set on the pan, then break it up and put it away until you’re ready to serve. If it’s humid, pour out a portion at a time and close the container between refills. The pieces stay crisp longer when they spend less time sitting in an open bowl.

For gifts, use small food-safe bags or lidded tins. Slip a strip of parchment into a tin if you’re packing it with cookies, so the popcorn has its own space. Peanut butter goes into every cluster, and butterscotch chips often contain milk. Label gift bags for peanuts and check the chips’ packaging for milk and other allergens before you finish the labels.

Frequently Asked Questions

Can I make the topping without a microwave?

Yes. Put the chips in a dry, heatproof bowl over a saucepan of barely simmering water. Leave a gap between the water and the base of the bowl. Stir as the chips soften, then lift the bowl away while a few small bits remain and finish stirring off the heat. Wipe moisture from the underside of the bowl before you move it over the tray.

Can I substitute honey for light corn syrup?

Honey adds its own flavor and can leave this type of coating tackier, especially on a humid day. Light corn syrup gives this recipe its mild flavor and chewy set. A recipe developed with honey is a better starting point if that’s the sweetener you want to use.

What’s the best way to double the recipe?

Make two batches of the syrup and toss them with two separate bowls of popcorn. Line both pans before you start. Each coating stays warm for a short window, so finishing one tray before starting the second gives you room to fold and spread the popcorn. You can melt the topping for both trays once the two batches are spread out.

Can I make a half batch?

Yes. Use 4 cups of popcorn and halve the remaining ingredients. For the butterscotch chips, that’s 2 tablespoons plus 2 teaspoons. Use a small saucepan so you can stir the syrup easily, and watch for bubbles earlier. Spread the popcorn on a parchment-lined quarter sheet pan and start melting the chips with a 15-second burst.

Can I use butter-flavored microwave popcorn?

You can. Butter-flavored bags vary quite a bit in salt and seasoning, so taste a few pieces before you make the syrup. If they’re already salty, leave out the fine sea salt. For a milder flavor that lets the peanut butter come through, use plain microwave popcorn and measure 8 cups after popping.

Set out the clusters in a shallow bowl so the small, chocolate-heavy pieces are easy to see and reach. A few handfuls also fit nicely between cookies and fudge on a dessert tray, where the popcorn brings a lighter crunch.