INGREDIENTS
1 1/2 cups
all purpose flour
1 tsp
baking soda
1/4 tsp
salt
1/2 cup
unsalted butter (softened slightly)
1/2 cup
brown sugar (I prefer dark) (packed)
1/4 cup
granulated sugar
1
large egg
1 tsp
pure vanilla extract
2 cups
mix-ins (see note)