Making Spicy Butter Chicken is an enjoyable process that leads to a delicious meal. By following these steps, you'll be on your way to creating this incredible dish:

1. Marinate the Chicken: In a bowl, combine the chicken, yogurt, lemon juice, garam masala, cumin, coriander, turmeric, and cayenne pepper. Mix well and let it marinate for at least 30 minutes (or up to overnight).

1. Cook the Chicken: In a large skillet or pan, melt 2 tablespoons of butter over medium heat. Add the marinated chicken and cook until golden brown and cooked through, about 8-10 minutes. Remove the chicken and set aside.

1. Sauté Onions: In the same pan, add the remaining 2 tablespoons of butter. Once melted, add the chopped onions. Sauté until soft and translucent, about 5 minutes.

1. Add Garlic and Ginger: Stir in the minced garlic and ginger, cooking for an additional 1-2 minutes until fragrant.

1. Incorporate Tomato Puree: Pour in the tomato puree, stirring well. Cook the mixture for about 8-10 minutes, allowing the flavors to combine and deepen.

1. Finish the Sauce: Reduce the heat to low and slowly mix in the heavy cream. Stir well to create a creamy sauce, letting it simmer for 5 minutes.

1. Combine Chicken and Sauce: Return the cooked chicken to the pan. Mix well, allowing the chicken to absorb the delicious flavors of the sauce. Cook for another 5 minutes, then season with salt as needed.

1. Garnish and Serve: Before serving, sprinkle fresh cilantro on top of the dish for a vibrant touch.