Making Christmas Rice Crispy Treats can be a straightforward process if you follow these simple steps:

1. Prepare the Pan: Grease a 9×13-inch baking dish with non-stick spray or butter to prevent sticking.

2. Melt Butter: In a large saucepan, melt the butter over low heat.

3. Add Marshmallows: Once the butter is melted, add the mini marshmallows. Stir constantly until completely melted and smooth.

4. Mix in Vanilla: If using, stir in the vanilla extract into the melted marshmallow mixture.

5. Combine Ingredients: Remove the saucepan from heat and add the Rice Crispy cereal. Gently fold in the cereal until it is fully coated with the marshmallow mixture.

6. Transfer to Baking Dish: Pour the mixture into the prepared baking dish. Press down firmly and evenly with your hands or a spatula to pack the mixture tightly.

7. Add Decorations: If desired, sprinkle festive toppings like sprinkles or drizzle melted chocolate on top for added decoration.

8. Set and Cool: Allow the treats to cool at room temperature for about 30 minutes. Once cooled, cut them into squares or rectangles.

9. Store: Store leftover treats in an airtight container for up to one week.

These steps will help you achieve delicious, festive Rice Crispy Treats that everyone will enjoy!