Stir the flour, salt and baking powder in a large bowl.
With an electric mixer, cream butter and sugar.
Add the eggs, vanilla and milk and mix until well blended.
Stir wet ingredients into dry ingredients with a spoon.
Stir gently, just until combined.
Spoon some batter into the bottom of 12 greased muffin cups.
You’ll use about half of the batter for this step.
Dollop Nutella in the middle of each muffin.
Top with more batter to seal the Nutella inside.
Bake at 400° for 15-20 minutes.