110g butter, softened

250g creamy peanut butter

250g icing sugar

3 tablespoons milk, or as needed


Place butter and peanut butter into a bowl and beat with an electric mixer. 

Gradually mix in icing sugar. 

When it starts to thicken, incorporate milk 1 tablespoon at a time until all the sugar is mixed in and the frosting is thick and spreadable. 

Beat until fluffy, about 3 minutes.