Moist and chewy snickerdoodle bars that are so simple to make!
Mix together the butter, brown sugar, eggs, salt, baking powder, and vanilla. Add the flour.
Mix well and pat into a greased 12" x 17" cookie sheet or two 9x13 pans.
Mix together the topping ingredients and sprinkle on top of bars.
Bake at 350 for 25-30 minutes. Check with a toothpick at 25 minutes - you want a few fudgy crumbs hanging on yet when done. Do NOT overbake!