Nibblous | christmas cupcakes

Ingredients

• 150g plain flour
• 1 teaspoon baking powder
• half teaspoon bicarbonate of soda
• 1 teaspoon ground mixed spice
• pinch of salt
• 100g soft unsalted butter
• 160g dark brown sugar
• 2 large eggs
• 3 tablespoons sour cream
• 125ml boiling water
• 75g dark chocolate, broken into pieces
• 1 teaspoon instant coffee
• 250g instant royal icing
• 1 packet green ready-to-roll icing
• about 30 cranberries for decoration