Black Bean Brownies

INGREDIENTS

• 3/4 cup cooked black beans
• 1 teaspoon instant coffee or espresso
• 2/3 cup sugar
• 1/2 teaspoon baking powder
• 1/3 cup flour
• 1/2 teaspoon salt
• 2 eggs
• 1/4 cup unsweetened cocoa powder
• 1 teaspoon vanilla extract
• 1/2 cup vegetable oil, or olive oil
• 1/4 cup confectioners' sugar, for dusting
• 1/2 cup mini chocolate chips, divided
• Butter, for greasing pan