Good-Cooking - Upside-Down Chocolate Cupcakes

Ingredients

• olate chips
• 1 tablespoon butter
• 1/4 cup melted butter
• brown sugar
• 1 tablespoon water
• 3 or 4 walnut halves
• sifted flour
• cocoa
• baking soda
• salt
• 1/4 cup butter
• sugar
• egg
• vanilla extract
• 1/2 cup water
• milk
• chocolate