Butter Burger

At Solly's Grille in Glendale, on Milwaukee's north side, the last thing that touches the burger before the crown of the bun is butter, a spoonful of it, melted over the patty and its stewed onions until it pools against the bread and starts looking for an exit. The kitchen works through more than 130 pounds of Wisconsin butter in a week. The sandwich lands on the counter already leaking, wax paper going translucent underneath, and the regulars eat leaning forward with elbows planted, because the butter keeps moving until it cools. Nobody treats this as a defect. It is the order, arriving as described.

The form is short. A thin patty, seared hard. Onions cooked down soft and sweet. A plain white bun. Then butter, salted and visible, applied at the end so it stays butter instead of vanishing into the cooking. That timing is the whole definition. A patty fried in butter is just a fried patty; the fat browns, picks up beef, and disappears into the crust. A butter burger holds its butter back until the build, where it melts on contact and soaks downward, so the first taste off the top of the bite is sweet cream before sear. Wisconsin put its signature ingredient on the burger the way other counters finish with mayonnaise: as a dressing.

The handling has narrow tolerances. Butter sent to the griddle too early burns; its milk solids blacken ahead of the beef, and the whole sandwich tastes of scorch, so the pat goes onto the patty in its last seconds of cooking, or straight onto the bun. The bun side has its own rules: a cut face toasted in butter on the flat-top crisps to a thin gold shell and stops absorbing, while an untoasted crumb wicks melted butter straight through and hands you wet paper. The patty stays thin on purpose, since a melting pat can reach every layer of a quarter-inch of beef but would sit on a half-pound pub patty as a slick. The onions are ballast rather than decoration, cooked down until their sweetness sits between the salt of the butter and the crust of the meat.

A butter burger announces itself by feel before flavor. The bag is heavier than it should be and warm at one corner. Unwrapped, the bun shines. The first bite gives toasted crunch for half a second before everything under it goes soft, beef, onion, and cream arriving as one warm slide, and a thin run of butter breaks for the wrist, which is why the counter staff deal out napkins like cards. The smell is closer to a pancake griddle than a burger joint, browned milk and a little sugar over the beef. By the last bite the bottom bun has gone to pudding, and the customary chaser, a scoop of frozen custard, extends the dairy straight through dessert.

The natural habitat is the custard stand, Milwaukee's particular institution, where a flat-top burger line and a frozen custard machine share one menu board. Kopp's runs butter burgers beside a flavor-of-the-day; Solly's keeps the older furniture, swivel stools and coffee in glass pots. The order code is short: butter burger, with cheese or without, fried onions or raw, custard after. Culver's carried the word far past the county line and built a drive-thru chain on it; the Culver's ButterBurger, its butter confined to the lightly toasted crown of the bun, gets a separate page here. Inside Wisconsin the term needs no gloss. Outside the state it still draws a double take, which Culver's long ago converted into a registered trademark.

The family splits on where the butter goes. The Solly's school melts it over the patty so it soaks the whole stack from above. The Culver's school butters only the bun and lets the beef speak plainer. A few taverns work softened butter into the raw grind, which juices the patty but hides the point; if nothing pools, nothing reads as butter. The name does not cover every burger that ever met the dairy case: a butter-basted patty at a steakhouse counter or a brioche brushed with the clarified stuff is a seasoning choice, not this sandwich. The nearest kin is the thin-patty griddle burger of the wider Midwest, same hardware, same speed, minus the finishing dairy. Wisconsin's contribution was to stop treating butter as a means and start treating it as a topping.

Solly’s Claim and the Butter State

The standard account starts in 1936, when Kenneth Salmon, called Solly, opened Solly's Coffee Shop near Green Bay Avenue and Burleigh Street in Milwaukee and buttered his hamburgers. The creation credit is the house's own, carried by ninety years of continuity rather than by a dated document, and no rival claimant from the era has surfaced with paper either, so Wisconsin has been content to let the matter rest with Solly. The shop moved north to Port Washington Road in Glendale in 1971. Glenn Fieber, whose stepfather Salmon was, bought it from his mother in 1993 and renamed it Solly's Grille, and in 2022 the James Beard Foundation named the place an America's Classic.

The chain chapter began on July 18, 1984, when George and Ruth Culver, with their son Craig and his wife Lea, opened Culver's Frozen Custard and ButterBurgers in Sauk City, an hour west of Milwaukee. Ruth had buttered the family's hamburger buns at home; the restaurant made her habit the trademark, buttering and toasting the crown rather than dressing the patty. The first patties were portioned with an ice cream scoop, custard-stand logic applied to beef, and the chain went on to plant the word ButterBurger on highway signs across the Midwest and the Sun Belt, which is how most Americans who know the term learned it.

Behind both shops stands the state's dairy politics. Wisconsin outlawed yellow margarine in 1895 and held that line for seventy-two years, the last state to give it up; Madison lore credits the fall to Senator Gordon Roseleip, who defended the ban until a blindfolded taste test tripped him in the 1960s, and whose family later admitted his wife had been quietly serving him margarine at home all along. The ban came off in 1967, but the repeal kept one clause that is still on the books: a Wisconsin restaurant may not serve margarine in place of butter unless the customer asks for it. The butter burger grew up in the one state where serving the substitute unasked has been illegal since 1967.