Crunchy Peanut Bars with Corn Flakes

Three tablespoons of butter. Half a cup of peanut butter. Marshmallows. Corn flakes. That’s almost the entire list, and it takes 15 minutes total. No bake. No cooling overnight. You melt, you fold, you press, you cut. I made these once when someone asked for peanut butter candy bars and I had exactly zero time. They came out crunchy and chewy at the same time. Haven’t stopped making them since.

Why You’ll Love This

Takes 15 minutes. Seriously. No oven required—just a saucepan and a pan.

Tastes like scotcharoos and reese’s peanut butter cups had a snack that actually stayed crunchy. That corn flakes texture matters.

No bake means you can make these while doing something else. Mostly doing something else.

Peanut butter and chocolate together with actual crunch. Most candy bars go soft. These don’t.

What You Need for Crunchy Peanut Bars

Unsalted butter and natural peanut butter. The natural stuff doesn’t have all the stabilizers, so it mixes better with marshmallows. Salted butter works too if that’s what you have. Mini marshmallows—the small ones melt faster and coat everything evenly. Regular marshmallows take forever. Five cups of corn flakes. Not the frosted kind. Plain. The crunch is the whole thing. Dried tart cherries. Adds a little brightness against all that sweetness. Sliced almonds. Toast them first if you want, but don’t—they’re fine raw. Mini dark chocolate chips. Not the regular size. Small ones stick better and don’t pool into clumps.

How to Make Them Crunchy and Thick

Spray your pan first. Nine-by-thirteen if you want thin bars you can grab quick. Five-by-seven if you want them substantial and chewy in the middle. Low to medium heat. Dump in butter, peanut butter, and marshmallows together. Stir with a wooden spoon constantly. Watch them. This is four to seven minutes usually. You’ll see the marshmallows go from chalky and distinct to glossy and creamy. Gentle bubbling around the edges means it’s ready. Not aggressive boiling. Not smoking. Just—glossy. Creamy. Off heat. Fold in the corn flakes, cherries, and almonds. Don’t overmix. You want some pieces to stay whole so the crunch survives. Press the mixture into the pan firm but not brutal. Use the back of a spoon or cover it with parchment and press with your hands. Even surface. You need enough pressure that it holds together but not so much that it becomes dense and hard. Sprinkle the dark chocolate chips on top right away while everything’s still warm. They’ll soften and stick but won’t fully melt. That’s the goal. Let it sit at room temperature until completely cold. This matters. Warm bars crumble. Warm bars stick to the knife. Patient bars slice clean.

What Goes Wrong and How to Fix It

Marshmallows burned. You rushed the heat or left it too high. Lower next time. Slower. The butter and peanut butter should look almost glossy before the marshmallows are ready. If it gets brown it’s past it. The bars won’t hold together. You either didn’t press hard enough or the mixture cooled too fast before pressing. Press immediately. Use both hands if you need to. Don’t wait. They’re too soft when you cut them. They weren’t fully cold. Leave them at least two hours. Overnight is fine. The chocolate chips pooled into one big clump. They do that sometimes. Sprinkle more evenly next time or use even smaller chips. Doesn’t affect the taste.

Crunchy Peanut Bars with Corn Flakes

By Emma

Prep:

6 min

Cook:

9 min

Total:

15 min

Servings:

12 servings

Ingredients

• 3 tablespoons unsalted butter
• 1/2 cup natural peanut butter
• 4 cups mini marshmallows
• 5 cups corn flakes
• 1/3 cup dried tart cherries
• 1/3 cup sliced almonds
• 1/4 cup mini dark chocolate chips

Method

1. 1 Spray a 9x13 or 5x7 pan with nonstick spray; choose smaller for thicker bars or larger for thinner ones.
2. 2 Low-medium heat. Melt butter, peanut butter, and marshmallows in a saucepan. Stir consistently with wooden spoon. Watch marshmallows melt, become glossy and creamy, about 4-7 minutes. Do not rush or burn—slick texture and gentle bubbling indicate ready stage.
3. 3 Remove from heat. Fold in corn flakes, dried cherries, and almonds. Mix just enough to coat but keep some crunch intact.
4. 4 Press mixture firmly into pan. Use back of spoon or place parchment on top and press with your hands. Should have even surface but not overly compacted or it gets tough.
5. 5 Sprinkle mini chocolate chips immediately on top so they stick but don’t melt completely. Let cool at room temperature until firm. Patience is key here.
6. 6 Slice once cold completely. Bars hold better when fully set; warm will crumble or stick.
7. 7 Store airtight; keeps texture longer in cool spots.

Nutritional information

Calories

190

Protein

4g

Carbs

25g

Fat

9g

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Frequently Asked Questions

Can I make these like reese’s peanut butter cups with more chocolate? You could melt chocolate and dip them but that’s a whole different thing. These are supposed to be more like scotcharoos—crispy and peanutty. If you want chocolate dominant, layer melted chocolate on the bottom of the pan before pressing the mixture in.

What if I don’t have dried cherries? Skip them. Doesn’t break anything. Or use raisins. Cranberries work too but they’re more tart.

Can I use regular peanut butter with the oil mixed in? Sure. It’ll work fine. The natural stuff with the separated oil just mixes smoother with marshmallows. Not a huge difference.

How long do these actually keep? In an airtight container, easily a week. The cool spot helps—don’t leave them on the counter. Texture stays better in the pantry than room temp.

Is this basically the same as reeses puffs cereal bars? Not really. Those use the cereal as the base. This uses corn flakes for crunch and adds nuts and cherries. More texture happening. More going on.

Can I make these into smaller bites like muddy buddy mix? You could toss everything in a bowl without pressing and just eat it as a mix. But then it’s not bars. They hold better as pressed squares. Less mess.