Preheat oven to 350 degrees

Grease 9x13 pan

In a large bowl, toss peaches into the greased pan, with cinnamon, vanilla, 3 Tablespoon sugar and 3 tablespoons four

In a seperate large bowl, combine 1 cup flour with old fashion oats and brown sugar. Cut in butter until crumbly consistency.

Pour the crumbly topping on top of the peaches

Bake uncovered for 45-50 minutes