In a large bowl, whisk together yogurt, olive oil, orange juice, vanilla, orange zest, eggs, and sugar
In a separate bowl, whisk together oat flour, coconut flour, baking powder, and salt.
Add the dry mixture to the wet, and whisk until just combined
Line a muffin tin with parchment paper muffin liners (these will ensure the muffins do not stick)
Distribute batter evenly into the 12 muffin cups, then shake/tap the pan on a flat surface until the batter settles flatly
Bake at 350 degrees for 28 - 32 minutes, or until a toothpick inserted comes out clean
In a small bowl, whisk together powdered sugar and orange juice to make the glaze
Drizzle glaze over muffins and enjoy!