Ingredients
Method
Preparation
- Line the bottom and sides of an 8-inch-square baking pan with parchment paper or foil coated with cooking spray.
- In a small bowl, thoroughly whisk together the flour, baking powder, and salt.
- Melt the butter in a medium saucepan until sizzling. Remove from heat and stir in cocoa, then sugar until well combined.
- Add egg, egg whites, and vanilla, and stir briskly until smooth and glossy.
- Stir in the flour mixture until just incorporated, then mix vigorously for about 50 strokes.
- Scrape the batter into the prepared pan, spreading it evenly. Cover and refrigerate for a few hours or up to 12 hours if possible.
Baking
- Remove from refrigerator 30 minutes before baking and preheat oven to 350F.
- Quarter marshmallows with an oiled knife and distribute the pieces over the batter, pressing them in. Sprinkle chocolate chips on top.
- Bake until marshmallows are golden brown, approximately 25 to 35 minutes.
- Let cool completely in the pan on a wire rack for about 2 hours.
- Cut into 16 brownies.
Notes
Serve at room temperature for optimal texture contrast. For a deeper cocoa profile, consider using darker chocolate chips. Add toasted nuts for added crunch while maintaining fudgy texture.
