– Sift flour, salt, and baking powder together in a medium bowl. Set aside.
– In a large mixing bowl or bowl of stand mixer, cream the butter and sugar together until light; about 2 minutes on high speed.
– Turn mixer to medium. Add the eggs, one at a time, mixing well after each addition.
– Add milk and vanilla extract and continue to mix on medium speed until well combined.
– Turn mixer to low speed. Slowly add flour mixture to batter until just combined. Don't over mix!
– Add blueberries and lemon zest. Gently fold into batter using a rubber or silicone spatula.
– Spray a muffin pan with cooking spray or line with paper or silicone liners. Fill the cups to the top with batter.
– Bake at 425º F for the firs 5 minutes then turn oven to 350º F for the remaining 20-25 minutes. Alternatively, bake for 25-30 minutes at 375º F.