Preheat oven to 375º. Lightly spray baking spray or line 24 muffin tins, set aside.
In a large bowl, combine and mix flour, sugar, baking powder, salt and cinnamon.
In a separate bowl combine milk, eggs and melted butter until well blended. Gently fold liquid mixture into the flour mixture. Stir until incorporated. Do not overmix! Fold in bananas and strawberries, gently mix until combined.
Spoon batter into muffin cups. Bake at 375° for 20 minutes or until golden brown. Remove muffins from tins to a cooling rack, allow to cool.