Sift flour, baking powder, and baking soda (and optional cinnamon, if using) into a large bowl.
Stir in the sugar.
In a separate bowl or measuring jug, whisk together the eggs, olive oil, and yogurt, until smooth.
Combine the pumpkin puree and the mashed banana and mix until thoroughly combined.
Pour the yogurt mixture into the pumpkin and banana mixture.
Slowly stir the liquid mixture into the dry ingredients in the large bowl, until just combined. DO NOT OVER STIR as it will make the muffins dense.
Fill the muffin cups. Sprinkle with a little raw sugar (Demerara or Swedish pearl) if desired, for a crunchy top.
Bake for about 20-25 minutes or until golden.
Remove them from the oven, and pan, and place on a cooling rack for a few minutes or longer, before serving.
Notes
PLEASE use a scale for best results.
If you are making larger muffins, bake for another 5 minutes, or until a skewer comes out clean, as ovens vary.
SERVING TIP: If serving immediately, I like to line a basket with a pretty napkin and put the fresh muffins in it to serve them. This keeps them warm, too.
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