Choc-mint whoopie pies | Women's Weekly Food

Ingredients

• 125 gram unsalted butter,softened
• 1/2 cup (110g) firmly packed light brown sugar
• 1 egg
• 3/4 cup (110g) plain (all-purpose)flour
• 1/4 cup (35g) self-raising flour
• 1 teaspoon bicarbonate of soda(baking soda)
• 1/3 cup (35g) cocoa powder
• 2/3 cup (160ml) buttermilk
• Mint butter cream
• 1 1/2 cup (240g) icing (confectioners') sugar
• 1 tablespoon milk
• 1 teaspoon peppermint extract
• green food colouring
• Chocolate ganache
• 1/4 cup (60ml) pouring cream
• 100 gram dark eating(semi-sweet) chocolate,chopped finely