📖 Instructions

1. **Step 1: Prep Your Sweet Potatoes.** Begin by thoroughly washing and peeling your sweet potatoes. Once peeled, cut them into roughly 1-inch chunks. This helps them cook more evenly and quickly.
2. **Step 2: Cook the Sweet Potatoes.** Place the sweet potato chunks in a large pot. Cover them with cold water by about an inch. Add a generous pinch of salt to the water – this seasons the potatoes from the inside out. Bring the water to a boil over medium-high heat, then reduce the heat to a simmer. Cook for about 15-20 minutes, or until the sweet potatoes are fork-tender. You should be able to easily pierce them with a fork. Don't let them get mushy, but ensure they're soft enough to mash smoothly.
3. **Step 3: Drain and Mash.** Carefully drain the cooked sweet potatoes in a colander. Allow them to sit for a minute or two to let any excess water steam off. This prevents a watery casserole. Transfer the hot, drained sweet potatoes to a large mixing bowl. Add the melted unsalted butter, light brown sugar, ground cinnamon, nutmeg, and vanilla extract. Using a potato masher or a large fork, mash the potatoes until they are completely smooth and free of lumps. You want a creamy, consistent texture here, so take your time! If you like it extra smooth, a hand mixer can help.
4. **Step 4: Incorporate Wet Ingredients.** Next, pour in the milk (or heavy cream for an even richer casserole) and gently stir it into the mashed sweet potato mixture until it's fully combined. Taste the mixture and adjust seasonings if needed – perhaps a little more brown sugar if you prefer it sweeter, or another pinch of cinnamon for more warmth. Set this glorious, creamy sweet potato base aside.
5. **Step 5: Preheat Oven and Prepare Baking Dish.** Now's the time to preheat your oven to 375°F (190°C). While the oven heats, lightly grease a 9x13 inch (or similarly sized, about 3-quart) baking dish with butter or cooking spray. Make sure to get the sides and corners!
6. **Step 6: Make the Toasted Coconut Topping.** In a separate medium-sized bowl, combine the shredded unsweetened coconut, all-purpose flour, granulated sugar, and a pinch of salt. Mix these dry ingredients together thoroughly. Then, drizzle in the melted unsalted butter and use your fingers or a fork to mix until the coconut mixture is crumbly and well coated. This should feel like a loose streusel. This step is where the magic really begins to happen, setting our casserole apart!
7. **Step 7: Assemble the Casserole.** Spoon the mashed sweet potato mixture evenly into your prepared baking dish. Smooth the top with a spatula. Then, evenly sprinkle the toasted coconut streusel topping all over the sweet potato layer. Make sure it's spread out nicely, reaching the edges of the dish.
8. **Step 8: Bake to Golden Perfection.** Place the assembled casserole into the preheated oven. Bake for 25-35 minutes. You're looking for the sweet potato base to be heated through and the coconut topping to be beautifully golden brown and fragrant. Keep an eye on the topping during the last 10 minutes, as coconut can go from perfectly golden to burnt quite quickly!
9. **Step 9: Cool and Serve.** Once baked, carefully remove the casserole from the oven. Let it cool on a wire rack for about 10-15 minutes before serving. This cooling period allows the casserole to set slightly and makes for easier scooping. Serve warm and bask in the compliments!
10. **Step 10: Enjoy Every Spoonful!** Seriously, take a moment to savor that creamy sweetness with the delightful crunch of toasted coconut. It's pure bliss!