Preheat the oven to 350°F (175°C) and coat a jumbo muffin tin or six 6-ounce ramekins with non-stick cooking spray.
In a large mixing bowl, whisk together the oat flour, vanilla protein powder, baking powder, and salt.
In a medium bowl, whisk the Greek yogurt, eggs, almond milk, and vanilla extract until the mixture is homogenous.
Fold the wet ingredients into the dry ingredients using a spatula until just combined; avoid over-aerating the batter.
Divide the batter equally among the prepared tins or ramekins, filling each approximately three-quarters full.
Distribute the blueberries evenly across the top of each bowl.
Bake for 18 to 22 minutes, or until the centers are set and a toothpick inserted comes out clean.
Cool in the pan for 5 minutes before serving warm or storing for meal prep.