In a medium bowl, whisk together the mashed bananas, oil, eggs, yogurt, and vanilla extract.
1 cup (240g) overripe mashed bananas, 1/2 cup (125ml) vegetable oil, 2 large eggs, 1/4 cup (60g) plain yogurt, 1 tsp vanilla extract
Add the wet ingredients to the dry ingredients and mix until just combined.
Divide the batter amongst the 12 muffin cups. Sprinkle some coarse sugar on top of each muffin if desired.
Bake for 20-25 minutes or until a toothpick inserted into the center comes out clean.
Notes
You can store these banana muffins in an airtight container at room temperature for up to 3 days or in the fridge for up to 5 days.To freeze - Place the muffins in a freezer-friendly container or ziplock bag and store them in the freezer for up to 3 months. Thaw overnight in the fridge and warm up in the microwave for a few seconds before serving.