Step 3: Prepare the Blondie Batter

In a large mixing bowl, combine the melted butter, brown sugar, and granulated sugar.

Whisk until the mixture becomes smooth and glossy. The melted butter helps dissolve the sugars slightly, creating the rich caramel flavor that makes blondies so delicious.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

In a separate bowl, combine the flour, baking powder, and salt.

Gradually add the dry ingredients into the butter mixture. Stir gently until everything is combined. Avoid overmixing because too much stirring can make the blondies less tender.

The batter should be thick and smooth.

Step 4: Add the Chocolate Layer

Spread half of the blondie batter over the graham cracker crust.

Sprinkle a generous layer of chocolate chips or chopped chocolate over the batter.

The chocolate will melt during baking, creating rich, creamy pockets throughout the dessert.

Step 5: Add the Marshmallow Layer

Sprinkle half of the mini marshmallows over the chocolate layer.

Add the remaining blondie batter on top, spreading it gently with a spatula.

Finish with the remaining marshmallows and a few extra chocolate pieces.

The marshmallows on top will become golden and slightly toasted while baking, giving the blondies their classic s’mores appearance and flavor.

Step 6: Bake the Blondies

Place the pan in the preheated oven and bake for approximately 30–35 minutes.

The blondies are ready when:

• The edges are golden brown
• The center looks set but still slightly soft
• The marshmallows on top are lightly toasted

Be careful not to overbake them. The best s’mores blondies should remain chewy and moist in the center.

Step 7: Cool Before Cutting

Allow the blondies to cool completely in the pan before slicing.

This step is important because the chocolate and marshmallow layers need time to set. Cutting them too soon may cause the layers to separate and create a messy texture.

Once cooled, lift the blondies using the parchment paper and cut them into squares.

Tips for Perfect S’mores Blondies

Use Room Temperature Eggs

Room temperature eggs mix more easily into the batter, helping create a smoother texture.

Do Not Overmix the Batter

Once the flour is added, mix only until combined. Overmixing can develop too much gluten and make the blondies dense instead of soft and chewy.

Choose Good Chocolate

Chocolate quality makes a noticeable difference. Dark chocolate creates a more balanced dessert, while milk chocolate gives a sweeter, more traditional s’mores flavor.

Toast the Marshmallows Carefully

If you want a more campfire-style finish, you can briefly place the baked blondies under the oven broiler for a few seconds. Watch carefully because marshmallows can burn quickly.

Store Them Properly

Store leftover s’mores blondies in an airtight container at room temperature for up to four days.

You can also freeze them by wrapping individual pieces tightly and storing them in a freezer-safe container. Allow them to thaw at room temperature before serving.

Serving Ideas

S’mores blondies are delicious on their own, but they can be made even more special with a few simple additions:

• Serve warm with a scoop of vanilla ice cream
• Drizzle with melted chocolate
• Add a sprinkle of crushed graham crackers before serving
• Pair with coffee, hot chocolate, or a glass of cold milk

They are also a great dessert for picnics, birthday parties, potlucks, and holiday dessert tables because they are easy to transport and serve.

Final Thoughts

S’mores blondies capture everything people love about the classic campfire dessert while transforming it into a convenient homemade treat. The combination of buttery blondie batter, crunchy graham crackers, melted chocolate, and toasted marshmallows creates a dessert that feels both familiar and unique.

With simple ingredients and an easy baking process, this recipe allows you to enjoy the flavors of summer nights and outdoor gatherings any time of the year. Whether shared with friends or enjoyed as a personal indulgence, s’mores blondies are a sweet reminder that some of the best desserts come from combining simple ingredients in creative ways.