Creating Slow Cooker Butter Chicken is easy when you follow these simple steps:

1. Prepare the Chicken: Cut the chicken thighs into bite-sized pieces and season with salt and pepper.
2. Sauté Onions: In a skillet, heat a little oil over medium heat. Add the chopped onion and sauté until translucent.
3. Add Garlic and Ginger: Stir in the minced garlic and ginger, cooking for an additional minute until fragrant.
4. Combine Ingredients: In the slow cooker, add the sautéed onions, garlic, and ginger. Then, add the chicken pieces, crushed tomatoes, garam masala, cumin, turmeric, chili powder, and brown sugar.
5. Mix Well: Stir everything together until the chicken is well coated with the spices and tomatoes.
6. Set the Slow Cooker: Cover and cook on low for 4 to 6 hours or on high for 2 to 3 hours, until the chicken is tender and cooked through.
7. Add Cream: About 30 minutes before serving, stir in the heavy cream and mix well. Adjust seasoning with salt and pepper, if needed.
8. Garnish: Before serving, sprinkle fresh cilantro on top for a burst of color and flavor.
9. Serve: Serve the butter chicken hot with cooked rice or warm naan.

These straightforward steps will guide you in creating this incredible dish effortlessly.