Mix dry ingredients together in a large bowl. Mix liquid ingredients well. Add the liquid ingredients to the dry ingredients and mix just until the flour is moistened. Batter will be lumpy. Fill 24 well-greased muffin tins 2/3 full and bake at 400 F. for 20 minutes. Cool 10 minutes in pans or wire rack. Loosen muffins with a knife; invert onto wire racks. Serve warm.