Family Tested & Approved
Preheat oven to 300 degrees. Grease or spray 9x13 pan.
Melt butter in saucepan. Remove from heat.
Stir in brown sugar,eggs,and flour. Mix well. Batter is thick.
Add vanilla extract and pecans. Spread into a 9x13 greased pan.
Bake in preheated 300 degree oven for 20 to 30 minutes. It depends on your oven. They are done when they are brown and pulling away from sides of the pan.