Gather all ingredients. Preheat the oven to 350 degrees F (175 degrees C).
Mix together oats, brown sugar, cinnamon, baking powder, and salt in a large bowl.
Beat in eggs, milk, melted butter, and vanilla extract. Stir in dried cranberries.
Spread into a 9x13-inch baking dish.
Bake in the preheated oven until top is golden, about 40 minutes. Serve and enjoy!
