Marsha, Marsha Marshmallow Squares

In a large saucepan, melt marshmallows and margarine over medium heat, stirring constantly. When mixture is smooth, remove from heat and stir in vanilla. Add cereal in small batches, stirring well after each addition; stir in chocolate chips.

Spray a 9 x 13-inch baking pan with nonstick spray. Press cereal mixture evenly into pan; cover with plastic wrap and refrigerate until firm (about 1 hour). For crunchy squares, store in an airtight container in the refrigerator. For chewy squares, store at room temperature. Make 24 squares.