Best S'mores Rice Krispies

Ingredients You’ll Need

• 5 cups (140 g) crisp rice cereal
• 2 cups (90 g) graham cereal or roughly broken graham crackers
• 1/2 cup (113 g) unsalted butter
• 16 oz (454 g) mini marshmallows, divided
• 1/2 tsp kosher salt
• 1 tsp vanilla extract
• 1 cup (170 g) semisweet chocolate chunks, divided

How to Make Best S’mores Rice Krispies

1. Step 1.

   Line a 9×13-inch pan with parchment and lightly grease it. Mix the crisp rice and graham pieces in a large bowl. Reserve 2 cups marshmallows and 1/3 cup chocolate.

2. Step 2.

   Melt butter over low heat. Add the remaining marshmallows and stir just until smooth, then remove from the heat. Stir in salt and vanilla.

3. Step 3.

   Pour the marshmallow mixture over the cereals and fold until coated. Let stand about 1 minute, then fold in the reserved marshmallows and most of the chocolate.

4. Step 4.

   Transfer to the pan and press gently into an even layer without compacting it. Scatter the remaining chocolate over the top and press it in lightly.

5. Step 5.

   Cool 25–30 minutes before lifting out and cutting into 16 squares.

Soft bars start with low heat

The classic Rice Krispies method melts butter and marshmallows over low heat, then removes the pan from the heat before the cereal goes in. That matters here too. You want a smooth binder, not a marshmallow mixture that has been cooking and reducing in the saucepan. The longer and hotter it cooks, the firmer the finished bars can become.

As soon as the marshmallows are smooth, move on. There is no benefit to boiling or browning the mixture for this version.

Why the graham goes in with the cereal

Using graham pieces as part of the dry mixture distributes the s’mores flavor through every square instead of leaving a graham layer that can slide away when you cut the bars. Keep some pieces a little larger so the finished bar still has visible graham texture rather than tasting like cereal dust.

If you use crackers rather than graham cereal, break them into bite-size pieces instead of crushing them completely.

Wait before adding most of the chocolate

Chocolate added directly to piping-hot marshmallow melts fast. That is not necessarily bad, but it gives you a more uniform chocolate streak rather than distinct pockets. A roughly one-minute pause after coating the cereal takes the most aggressive heat off the mixture while it is still sticky enough to hold the chocolate and reserved marshmallows.

Semisweet chocolate keeps the bars from becoming overwhelmingly sweet. Milk chocolate gives a more classic campfire flavor but makes the overall bar sweeter.

Press enough to level, not enough to pack

This is where a lot of cereal bars lose their soft texture. The mixture needs contact with the pan so the squares hold together, but it does not need to be compressed into a brick. Use lightly greased hands, parchment or a buttered spatula and stop once the surface is reasonably even.

If the pan looks slightly rustic, that is better than squeezing all the air out of the cereal.

For a party, make them close to when you need them

These are at their best when the cereal is still crisp and the marshmallow binder is soft. Make them the same day when practical, or store airtight at room temperature and serve within about 2 days for the best texture. Layer cut squares with parchment so exposed chocolate does not glue them together.

Refrigeration is not useful here; it firms the marshmallow and makes the bars less pleasant to bite.

Variations that keep the same structure

Milk chocolate: sweeter and more traditional. Extra graham: replace some crisp rice rather than simply adding a large amount of extra dry material, or the binder may not coat everything well. More visible marshmallow: keep the reserved mini marshmallows away from the hottest mixture and fold them in at the end as written.