Banana sour milk pancakes

Ingredients

• 230ml sour milk (low or full fat)
• 130g plain or wholemeal flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt (if using unsalted butter)
• 1 tablespoon sugar or an equivalent amount of sweetener
• 1 tablespoon melted butter or vegetable oil
• 2 ripe bananas, diced
• 1 egg at room temperature
• 1 teaspoon vanilla extract