separate bowl, combine the flour, baking powder, and salt. Gradually stir the dry ingredients into the wet mixture until just combined. Be careful not to overmix.
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Spread the Batter
Spread the batter evenly into the prepared baking pan. It will be thick, but it spreads easily with a spatula. -
Add the S’mores Topping
Sprinkle the chocolate chips evenly over the batter. Top with the mini marshmallows and graham cracker crumbs, pressing them down gently. -
Bake
Bake for 20–25 minutes, until the edges are golden and the marshmallows are puffed and