" Chocolate Cola Cupcakes with Fizzy Cola Frosting Makes approx. 12 large cupcakes 200g flour, sifted 250g superfine sugar 1/2 tsp. baking powder pinch salt 1 large free-range egg 125ml buttermilk 1 tsp. vanilla extract 125g unsalted butter 2 tbsp. cocoa powder 175ml Coca-Cola For the frosting 125g unsalted butter, softened 400g confectioners’ sugar 11/2 tbsp. cola syrup (I used Soda Stream) 40ml whole milk Pop Rocks, to taste fizzy cola bottles, candied lemon slices, striped straws or candy canes to decorate Preheat the oven to 350°F. Line two 6-cup muffin pans with paper liners. In a large bowl, combine the flour, sugar, baking powder and salt. In a separate bowl, beat together the egg, buttermilk and vanilla. Melt the butter, cocoa and Coca-Cola in a saucepan over low heat. Pour this mixture into the dry ingredients, stir well with a wooden spoon, and then add the buttermilk mixture, beating until the batter is well blended. Pour into your prepared pans and bake for 15 minutes, or until risen and a skewer comes out clean. Set aside to cool. To make the frosting, beat together the butter and confectioners’ sugar until no lumps are left—I use a free-standing mixer with the paddle attachment, but you could use a hand-held mixer instead. Stir the cola syrup and milk together in a pitcher, then pour into the butter and sugar mixture while beating slowly. Once incorporated, increase the speed to high and beat until light and fluffy. Carefully stir in your Pop Rocks to taste. It does lose its pop after a while, so the icing is best done just a few hours before eating. Spoon your icing into a piping bag and pipe over your cooled cupcakes. Decorate with fizzy cola bottles or a slice of candied lemon, a stripy straw or candy cane and an extra sprinkling of popping candy. "
― Jenny Colgan , Christmas at the Cupcake Café (At the Cupcake Café, #2)