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Sweet & Baked

Lemon Rice Krispie Treats

This lemon rice krispie treats recipe melts butter and marshmallow with fresh lemon zest and juice, then folds in crisp rice cereal for a quick, no-bake treat ready in just 20 minutes. This is the treat that proves lemon works in absolutely everything, even the pan of marshmallow cereal bars you’ve been making since you were seven. Cut a batch alongside our lemon crinkle cookies for a kids’ party dessert table.

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Quick answer: Butter and marshmallow melted with fresh lemon zest and juice, then folded with crisp rice cereal for a quick, no-bake treat. Ready in just 20 minutes, with a genuine citrus tang instead of just a hint of zest.

A stack of pale yellow lemon rice krispie treat squares on parchment paper, with visible lemon zest flecks throughout
Prep10 min
Cook10 min
Total20 min
Serves16 bars
PPin

Instructions

1

Melt the butter in a large pot over low heat. Add the marshmallows and stir constantly until fully melted and smooth.

2

Remove from heat and stir in the lemon zest, lemon juice, and food coloring if using.

3

Add the crisp rice cereal and stir quickly until evenly coated, working fast before the mixture cools and sets.

4

Press the mixture firmly and evenly into a greased 9x13-inch pan, a piece of parchment paper or greased hands help prevent sticking.

5

Let cool completely at room temperature, about 20-30 minutes, before cutting into 16 squares. Drizzle with melted white chocolate if desired.

Zesty Tip: Work fast once the cereal goes in. The marshmallow mixture sets up quickly as it cools, and pressing it into the pan while it's still warm and pliable is what gives you clean, even bars instead of crumbly ones.

Questions people actually ask

Why add lemon juice to a marshmallow mixture?

It cuts through the sweetness of the marshmallow and gives the bars an actual citrus tang instead of just a hint of zest flavor. Adding it off the heat keeps it from thinning the mixture too much.

Can I skip the food coloring?

Yes, it's purely cosmetic. The bars taste exactly the same without it, just less obviously yellow.

Why are my bars too hard?

You likely pressed the mixture down too firmly, or cooked the marshmallow too long before adding the cereal. A gentle, even press is all you need.

How long do these keep?

In an airtight container at room temperature, they stay fresh for about 3 days. They get slightly harder over time, so they're best within the first day or two.

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