Creating Sticky-Bun Baked Oats is easy, and following these steps will guide you through the process efficiently:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with cooking spray or butter.
2. Mix Dry Ingredients: In a large mixing bowl, combine the rolled oats, brown sugar, baking powder, ground cinnamon, and salt. Stir until evenly mixed.
3. Whisk Wet Ingredients: In a separate bowl, whisk together the milk, eggs, and vanilla extract until fully combined.
4. Combine Mixtures: Gradually pour the wet mixture into the dry oat mixture, stirring well to ensure all ingredients are incorporated.
5. Add Nuts and Fruits: Fold in the chopped nuts and, if desired, add raisins or dates for an extra touch of sweetness.
6. Transfer to Baking Dish: Pour the mixture into the greased baking dish, spreading it evenly across the surface.
7. Drizzle with Butter: Drizzle the melted butter or coconut oil over the top of the oat mixture for added richness.
8. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
9. Cool and Slice: Allow it to cool in the baking dish for 10-15 minutes before slicing into squares.
10. Enjoy: Serve warm and enjoy the delectable flavors of Sticky-Bun Baked Oats at your breakfast table!