1) Mix the dry ingredients until blended.
2) In another bowl, mix eggs, vanilla, and buttermilk together until well blended.
3) Add dry mix to wet mix a little at a time and mix with a spoon (wooden if possible). Do not overmix. Batter should have some lumps and be a thick but pourable consistency.
4) Melt butter in a pan, cast iron skillet, or griddle to 350F. Pour batter onto hot pan and spread blueberries around the cakes. Cook 2-3 minutes until you see bubbles rising through the batter. Flip and cook another 1-2 minutes. Brush with melted butter. Serve with powdered sugar and maple syrup.