These easy S'mores Bars combine all the delicious flavors of a classic s'more - chocolate, marshmallow and graham crackers - into a simple portable cookie bar, perfect for summer!
Preheat the oven to 350F and line a 9 x 9 pan with a double layer of baking parchment.
Melt the butter, and then in a large mixing bowl beat in the sugar until smooth and combined. Once the mixture is cool to the touch, beat in the vanilla and egg.
Stir in the flour, baking powder and baking soda and combine to form a dough. Then fold in the graham crackers.
Press half the cookie dough into the bottom of the prepared pan, making sure it goes right to the edges. Then, dollop over the marshmallow fluff, spreading it with the back of a wet spoon. Scatter over the chocolate, then crumble the remaining cookie dough over the top, pressing it into a smooth layer, trying your best to cover all the chocolate and marshmallow fluff - but don’t worry if there are a few gaps!
Sprinkle with flaky sea salt before baking for 30 minutes until puffed and golden.
Allow the bars to cool completely in the pan before lifting out onto a cutting board with the help of the double baking parchment layer and cutting into squares with a sharp knife.
Notes
These s'mores bars should keep well in an air tight container for up to 3 days.