Banana MUFFINS

Banana muffins ( 12 pieces)
280 gr. wheat flour
2 tsp baking powder
1/3 tsp baking soda
1/2...1 tsp cinnamon
1/4 tsp salt
1 egg
150 g of sugar
2 ripe bananas
6 tbsp vegetable oil
1 tsp vanilla sugar
Bake muffins at 374 F -18 ... 20 minutes . The baking time and temperature depend on the characteristics of the oven.