Get your butter melting. Combine all dry ingredients in one bowl, sifting to make sure there are no lumps. Pop wet ingredients into the other, along with the butter, now melted. Then combine together into one of the bowls. It will be really liquidy. Let it stand for 2 minutes to firm up, then spoon into the mini or large muffins. Bake for 25minutes for large muffins and about 15 minutes for minis – just check a clean skewer comes out to be sure!