Good-Cooking - Shoofly Cupcakes

Ingredients

• 2 1/2 cups all-purpose flour
• 1 1/2 cups light brown sugar, firmly packed
• 1/2 cup butter
• 1 teaspoon baking powder
• 1 cup dark brown sugar, firmly packed
• 1 1/2 cups boiling water
• 1 teaspoon baking soda