Making sticky-bun baked oats is easy. Follow these simple steps for a delicious result:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a baking dish with butter or non-stick spray.
2. Mix Dry Ingredients: In a large bowl, combine rolled oats, cinnamon, and salt. If using, stir in the chopped nuts and raisins.
3. Prepare Wet Ingredients: In another bowl, whisk together milk, brown sugar, maple syrup, eggs, and vanilla extract until fully combined.
4. Combine Mixtures: Pour the wet ingredients into the dry ingredients and mix until just combined. Make sure not to overmix.
5. Prepare the Topping: In a small saucepan over low heat, melt the butter. Once melted, whisk in brown sugar, maple syrup, and vanilla extract until smooth. Remove from heat and set aside.
6. Assemble the Dish: Pour the oat mixture into the greased baking dish. Drizzle the topping evenly over the oat mixture, ensuring even coverage.
7. Bake: Place the baking dish in the preheated oven. Bake for 30-35 minutes, or until the oats are set and the top is golden brown.
8. Cool Slightly: Once baked, remove from the oven and allow to cool for about 10 minutes before slicing.
9. Serve Warm: Cut into squares or scoop out portions and serve warm.