These double chocolate muffins are crazy good, and I mean crazy addictive as well. Soft, moist, full of melty pockets of chocolate, perfect for breakfast!
You may use DIY buttermilk/soured milk as a substitute. Simply measure out 1 cup of milk and stir in 1 tablespoon white vinegar and let the mixture stand for 5-10 minutes until the milk is curdled. Your DIY buttermilk is ready for use!