Growing up, these yummy little squares were featured fairly prominently on the potluck and special dessert rotation. This is my Mater's recipe -- I believe that it came originally from a Mennonite cookbook.
They take a bit of time to bake but are super quick to put together. It's a great dessert to pop into the oven right before you sit down to dinner so that they're nice and warm when you're ready for dessert!
1/2 cup butter
1 cup brown sugar
1 cup flour
1 tsp baking powder
1/4 tsp salt
1/2 cup chopped nuts, or oats
1 tsp vanilla
Melt butter and blend with sugar; add egg and beat vigorously.
Combine dry ingredients. Add dry ingredients to wet and mix well.
Add chopped nuts and vanilla.
Spread dough into greased 8x8" pan.
Bake at 350F for 30 minutes.
Cut into squares while still warm.