Creating Crockpot Sweet Potato Casserole with Marshmallows is simple! Just follow these easy steps:

1. Prepare Sweet Potatoes: Peel and cube the sweet potatoes into uniform pieces for even cooking.
2. Mix Ingredients: In a large bowl, combine the cubed sweet potatoes, granulated sugar, brown sugar, vanilla extract, milk, melted butter, cinnamon, and nutmeg. Stir until well combined.
3. Transfer to Crockpot: Pour the sweet potato mixture into the crockpot, spreading it evenly.
4. Cook: Cover and cook on low for 4-6 hours or on high for 2-3 hours, until the sweet potatoes are tender.
5. Add Topping: About 30 minutes before serving, sprinkle the mini marshmallows evenly over the top of the casserole. Cover and let the marshmallows melt and brown slightly.
6. Optional Pecans: If desired, add chopped pecans along with the marshmallows for added crunch and flavor.
7. Serve: Once the marshmallows are golden and gooey, your casserole is ready to enjoy!

These straightforward steps will help you create an amazing dish with minimal effort while ensuring maximum flavor.