Line a 9 x 13-inch baking dish with aluminum foil, then butter the foil or spray with cooking spray.
In a large pan, melt together the butter and 15 cups of marshmallows over low heat while stirring constantly. After the marshmallows are completely melted, add the vanilla.
10 tablespoons unsalted butter, 2 teaspoons pure vanilla extract
Next, stir in the cereal. Remove from heat, and mix in the remaining 5 cups of miniature marshmallows and chocolate candies (M&Ms).
Scoop out the warm rice krispie treats, and transfer to the prepared baking dish. Butter your hands, and press the mixture into the dish to form an even layer.
Allow the treats to set for at least 30 minutes before cutting. Cut into 12 large squares or 32 small squares, and save any extras in an airtight container for up to 3 days.
Notes
The calories listed are an approximation based on the ingredients in the recipe card and a serving size of 1 square (rice krispie treat). Actual calories will vary.
The amount of extra marshmallows and M&Ms can be reduced or omitted.
This recipe makes a large batch and can be halved if needed.
Nutrition Facts
Valentine's Rice Krispie Treats
Serving Size
1 treat
Amount per Serving
Calories
224
% Daily Value*
Fat
7
g
11
%
Saturated Fat
4
g
20
%
Trans Fat
0.2
g
Polyunsaturated Fat
0.2
g
Monounsaturated Fat
1
g
Cholesterol
11
mg
4
%
Sodium
62
mg
3
%
Potassium
11
mg
0
%
Carbohydrates
40
g
13
%
Fiber
0.5
g
2
%
Sugar
26
g
29
%
Protein
2
g
4
%
Vitamin A
138
IU
3
%
Vitamin C
0.1
mg
0
%
Calcium
18
mg
2
%
Iron
0.4
mg
2
%
* Percent Daily Values are based on a 2000 calorie diet.