Graham Cracker Blondies:

• 1 cup all-purpose flour
• 1/2 cup Graham cracker crumbs
• 1 tsp baking powder
• 1/2 cup unsalted butter (1 stick)
• 1 cup brown sugar, packed
• 1/2 tsp kosher salt
• 1 large egg
• 2 tsp vanilla extract

Dark Chocolate Ganache:

• 1/3 cup whipping cream
• 6 oz. dark chocolate, at least 70% cocoa, roughly chopped

Marshmallow Fluff Frosting:

• 3 large egg whites
• 2/3 cup sugar
• 1/4 tsp cream of tartar
• 1 tsp vanilla extract