Banana Blueberry Muffins

1/2 cup unsalted butter, softened

1 cup sugar

2 eggs

3 ripe mashed bananas or 2 mashed and 3/4-1 cup blueberries

a pinch of salt

2 cups of flour

1/2 tsp baking soda

Cream butter and sugar until light; add pinch of salt; eggs one at a time and then the mashed bananas.

In batches add the flour that you have sifted with the baking soda.

Gently fold in the blueberries.

Bake at 350° F for about 30 minutes.