In a large mixing bowl, whisk together greek yogurt, olive oil, lemon juice, vanilla extract, eggs, sugar, and lemon zest until well combined
In a separate bowl, whisk together oat flour, coconut flour, baking powder, and salt
Add the dry ingredients to the wet, mixing until just combined (do not over mix)
Line a muffin tin with parchment paper liners (these make the muffins not stick to the liner)
Distribute the muffin batter evenly into the 12 cups
Bake at 350 degrees for 22 - 26 minutes, until a toothpick inserted comes out clean
Whisk together powdered sugar and lemon juice in a bowl to make the glaze
Drizzle glaze over the muffins
Store leftover muffins in the fridge for a frosting like texture!