Chocolate 'Mallow Cookie Cups | America's Test Kitchen

Ingredients

• 1 1/2 cups (7 1/2 ounces/213 grams) all-purpose flour
• 1/2 cup (1 1/2 ounces/43 grams) unsweetened cocoa powder
• 1/4 teaspoon salt
• 1/4 teaspoon baking soda
• 1/4 teaspoon baking powder
• 1 cup (7 ounces/198 grams) sugar
• 8 tablespoons unsalted butter, softened
• 1 large egg
• 1 teaspoon vanilla extract
• 40 mini-marshmallows
• 1/4 cup milk chocolate chips