For the beer pretzel muffins, beat the egg lightly and mix well with the butter (or oil) and milk (or buttermilk or yogurt).Stir in the finely chopped olives and the cubes of feta cheese.
Sift the baking powder and baking soda into the flour and mix with salt, pepper and the grated pretzels.Now carefully fold the flour mixture into the egg mixture.Pour the mixture immediately into the muffin tray and bake the beer pretzel muffins with hot air at 160 degrees for 20 minutes.