Hamburger Cheese (usually processed cheese slices but often Cheddar, Swiss, pepper jack, or blue), either melted directly on the meat patty or crumbled on top, is generally an option. Condiments might be added to a hamburger or may be offered separately on the side including mustard, mayonnaise, ketchup, salad dressings and barbecue sauce. Other toppings can include bacon, avocado or guacamole, sliced sautéed mushrooms, cheese sauce, chili (usually without beans), fried egg, scrambled egg, feta cheese, blue cheese, salsa, pineapple, jalapeños and other kinds of chili peppers, anchovies, slices of ham or bologna, pastrami or teriyaki-seasoned beef, tartar sauce, french fries,
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"