The official recipe for Rice Krispies treats calls for 3 tablespoons butter, 1 package large marshmallows or 4 cups miniature marshmallows, and 6 cups Kellogg's Rice Krispies cereal. Melt the butter and marshmallows over low heat and then mix with the Rice Krispies. Press mixture into a pan and cool.
To make the recipe in the microwave, melt the butter and marshmallows in a microwave-safe bowl on high for two minutes. One 7-ounce jar of marshmallow creme is an acceptable substitute for the marshmallows. Stir and then microwave an additional minute. Stir in the Rice Krispies and press into a pan. Use a buttered spatula to press the mixture into a butter or wax paper-lined pan to prevent sticking.
Cut the finished product into 2-inch squares. Eat within two days of cooking, or freeze for up to six weeks in an airtight container.
There are many alternate takes on this simple recipe. For one simple variation, sprinkle in 1/2 cup of candy pieces, chocolate chips or butterscotch chips. Another variation calls for Cocoa Rice Krispies instead of regular Rice Krispies. Other recipe suggestions on the Rice Krispies website call for adding frosting or chocolate topping to the treats, while some include ice cream.