INGREDIENTS
1
Banana, large very ripe
1
Egg, large
1 cup
All purpose flour
1/2 tsp
Baking powder
1/2 tsp
Baking soda
1/2 cup
Golden brown sugar, packed
1/4 tsp
Salt
1/2 cup
Semi sweet chocolate chips
1/2 tsp
Vanilla extract
1/2 cup
Walnuts
1/4 cup
Greek yogurt
6
Tablepsoons unsalted butter