Directions :
1. Heat oven to 375 degrees F. Cook macaroni in a large pot of salted boiling water until tender but not mushy,about 8-10 minutes. Drain well and pour into a large mixing bowl.
2. Melt on low the Velvetta Cheese and ¾ cup milk until melted (stir often). Pour Melted Cheese Sauce over Pasta and Stir. Add in butter,¾ cups milk,eggs,1 cup shredded cheeses,salt and pepper.
3. Mix well and transfer to a 2 quart baking dish. Pour the remaining cheese on top. Bake until top crust is golden brown and casserole is bubbling ( about 25 minutes ). Serve hot
