Heat the oven to 375 degrees. In a large bowl, combine the first six ingredients. Blend well. Add flour and mix well. Press dough evenly over a 12 to 14 inch pizza pan, forming a ridge around the edge. Bake for 10 minutes. Take pan out and sprinkle marshmallows and chocolate chips over the top. Continue baking for 5 to 8 minutes or until marshmallows are golden brown. Cool and then cut and enjoy. If eating later pop in microwave for a few seconds to get warm. Serves about 20 people.