Preheat oven to 375°F (190°C).
In a medium bowl, mix together flour, oats, baking powder, baking soda, cinnamon, and salt.
In another bowl, mash bananas then add peanut butter, honey, Greek yogurt, almond milk, egg, and vanilla extract.
Add wet ingredients to dry ingredients and mix until well combined.
Line the muffin tin with liners and evenly pour mixture into the cups.
Bake for 15 minutes.
For the peanut butter drizzle, combine peanut butter, honey, and almond milk.
Top muffins with peanut butter drizzle and crushed peanuts (optional).
