Preheat oven to 400 degrees and grease a muffin tin with avocado oil spray
In a small bowl mix eggs, yogurt, milk, applesauce and vanilla until evenly combined.
Add all dry ingredients to a large bowl and mix.
Fold wet ingredients into dry ingredients until well incorporated.
In a small bowl, add blueberries and 2 tbsp of flour. Lightly mix till berries are evenly coated.
Fold blueberries into batter and scoop batter evenly into muffin tins. Muffin tins will be almost full.
In a separate bowl combine the crumble ingredients and evenly sprinkle over muffin batter
Place in oven and bake for about 18-22 minutes until batter is set and the muffins are becoming lightly brown.
Let cool for about 20 minutes and ready to serve.
Store at room temperature for 2-3 days or wrap individually in plastic wrap or aluminium foil and freeze.