Grease a 9x13-inch pan with a light coating of cooking spray or butter then set aside.
In a very large pan, melt together the butter and 20 ounces (two bags) of mini marshmallows over low heat while stirring constantly. After the marshmallows are melt completely, add the vanilla and salt, if using.
8 tablespoons unsalted butter, 20 ounces mini marshmallows, 1 teaspoon vanilla extract, Pinch salt
Remove the pan from heat, then stir in the cereal and remaining 5 ounces of mini marshmallows. Make sure to stir really well and get to the bottom and edges of the pan where melted marshmallow likes to hide.
12 ounces Rice Krispies Cereal, 5 ounces mini marshmallows
Scoop out the warm rice krispie treats, and transfer them to the prepared baking dish. Coat your hands or a spatula with butter, and gently 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 squares and serve.
Notes
The calories listed are an approximate and based on the serving size and ingredients listed.
Store leftover treats in an airtight container at room temp for up to 4 days.
The vanilla and salt are both optional, so omit them if you'd rather not use them.
Nutrition Facts
Marshmallowy Rice Krispie Treats (9x13 Pan!)
Serving Size
1 square
Amount per Serving
Calories
364
% Daily Value*
Fat
8
g
12
%
Saturated Fat
5
g
25
%
Trans Fat
0.3
g
Polyunsaturated Fat
0.5
g
Monounsaturated Fat
2
g
Cholesterol
20
mg
7
%
Sodium
257
mg
11
%
Potassium
41
mg
1
%
Carbohydrates
72
g
24
%
Fiber
0.2
g
1
%
Sugar
37
g
41
%
Protein
3
g
6
%
Vitamin A
2119
IU
42
%
Vitamin C
18
mg
22
%
Calcium
5
mg
1
%
Iron
9
mg
50
%
* Percent Daily Values are based on a 2000 calorie diet.