Prep ahead: Mix everything in advance, cover, and refrigerate. When you’re ready to serve, bake it fresh for that just-made flavor. To avoid an oily dip, ensure all ingredients are combined evenly. Not a fan of blue cheese? Skip it, or try adding sliced green onions for a fresh finish. You can freeze unbaked dip for up to 3 months. Thaw overnight in the fridge and bake as directed.