Combine 1/2 cup greek yogurt with 1/2 cup peanut butter, the oats, bananas, eggs, honey, vanilla baking powder and salt in a mixer. Pulse until all is blended together.
Pour into greased tins and bake at 400 for 10 minutes. Set muffins aside to cool while you whip up the frosting.
Put 1 1/2 cup greek yogurt, 3 tbsp peanut butter, 1/2 scoop of Shakeology and a little flax seed powder into a mixer and stir until it forms a creamy texture. Spread on top of the muffins and store in the fridge!
You can use vanilla or chocolate Shakeology instead.