Preheat oven to 375 degrees F (190 degrees C).
In a mixing bowl, add Golden Delicious Apple (5), Granulated Sugar (1/3 cup), Vanilla Extract (1 teaspoon), Ground Cinnamon (1 teaspoon) and All-Purpose Flour (2 tablespoon). Mix together until apples are coated.
In another mixing bowl, add All-Purpose Flour (1 1/4 cup), Old Fashioned Rolled Oats (1 cup), Brown Sugar (2/3 cup), Ground Cinnamon (1 teaspoon), and Salt (1/4 teaspoon). Stir together. Add Butter (3/4 cup) and mix with fingers until mixture has the texture of breadcrumbs.
Pour apples into a baking dish. Top with the oat mixture.
Bake in the preheated oven for 40-45 minutes, or until golden brown.
Allow to cool slightly. Serve and enjoy!