The difference between this and other recipes is putting ALL the ingredients into the freezer before making the batter.
200g plain flour
1.5tsp baking powder
a good pinch of salt
Mix the dry ingredients together in a bowl and then place the bowl in the freezer for at least 45 minutes. Put the can/bottle of beer into the freezer as well but don’t leave it long enough to freeze solid. When the batter is needed whisk the beer into the dry ingredients and use immediately.