Whisk eggs and granulated sugar until combined.
Add yogurt, oil, and vanilla extract.
Fold in the dry ingredients.
In a bowl sprinkle 1-2 T. flour over 1 cup blueberries.
Fold berries into batter.
Divide batter into cups, filling about 2/3 of each cup.
Place rest of blueberries on the tops and sprinkle on lots of crumbs.
Put in oven and immediately reduce temp to 375.
Bake 18-20 mins. (till toothpick is clean)
Cool and EAT!