Preheat oven to 375
Beat butter and sugar together in a mixing bowl, using a hand mixer. Set aside
Mix together dry ingredients (except blueberries), set aside
Add eggs to butter and sugar mixture, and beat eggs, and milk, and vanilla, into the mixture.
Combine the wet ingredients with the dry, being careful to not overmix.
Fold in blueberries.
Grease muffin tin, or use liners
Fill each slot ¾ full of mix.
Bake in preheated oven for 25-30 minutes until toothpick inserted in center comes out clean. Remove from hot pans and cool immediately.
