Preheat oven to 170C and line standard muffin tray with muffin liners or lightly spray with oil
Whisk dry ingredients together and set aside
Whisk wet ingredients together until combined then fold in dry ingredients
Distribute evenly into muffin trays - should make 12 regular muffins
Top with pecan crumble (if using) and bake for about 20-30 minutes until topping is slightly golden and muffins are cooked through when tested with a knife