Preheat the oven to 350 degrees F (180 C). Mix the wet ingredients in a bowl until well combined.
Add the 1 1/4 cup flour and the rest of the dry ingredients and whisk well to make a smooth batter. Add rest of the flour 1 tbsp at a time to make a smooth flowy batter, but not overly watery or overly stiff. You might not need all of the flour if using whole grain flour.
Pour the batter into a greased donut pan. Even it out using a spatula.
Bake for 20 to 22 minutes. Cool in the pan for 5 minutes then remove the donuts. (bake for 12 mins for mini muffins, 22 mins for regular size muffins).