Rocky Road Brownie Cupcakes - The BakerMama

Ingredients

• 1 cup (2 sticks) unsalted butter
• 1 cup semi-sweet chocolate chips, divided
• 1/2 cup unsweetened cocoa powder
• 2 cups granulated sugar
• 3 large eggs, at room temperature
• 1 tablespoon vanilla
• 1 and 1/2 cups all-purpose flour
• 1/2 teaspoon salt
• 1/2 cup chopped pecans
• 1/2 cup marshmallow bits