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Kendu Spice Co. · Marin, CA  —  Moon Rock

Moon Rock
Burgers

Smash burgers. Crispy edges. Deep bark.

🌙
5m
Prep Time
🌡️
Ripping Hot
Cook Temp
🎯
160°F
Pull Temp
⏱️
20m
Total Time
Smash burgers with perfect crispy crust — lacy edges on cast iron, seasoned with Moon Rock BBQ Rub

The method

1

Ball it loosely

Divide your ground beef into loose, lightly-formed balls — about 3–4oz each for smash burgers. Don't pack or compress the meat; a loose ball gives you maximum crispy edge when smashed.

2

Get the surface ripping hot

Preheat a cast iron skillet or flat-top over high heat until it's smoking hot. This is non-negotiable for a smash burger — a cool surface means a steamed, gray patty instead of a seared, dark crust.

3

Smash and season immediately

Drop the ball onto the hot surface and smash it flat hard with a spatula. Season the exposed top generously with Moon Rock right away — the heat will pull it straight into the crust as it forms.

Season right after the smash, every time
4

Sear hard, flip once

Let the patty sear undisturbed for 2–3 minutes until the edges turn dark brown and lacy. Flip once, add cheese immediately if using, and cook another 1–2 minutes to your target temp.

Don't press or move the patty before the crust sets — that's where the bark comes from.

5

Pull around 160°F internal

Smash patties cook fast — pull them around 160°F internal for a juicy burger with a deeply caramelized Moon Rock crust on both sides.

Crispy edges, deep bark
6

Build and serve immediately

Stack onto a toasted bun right away while everything's hot — smash burgers wait for no one. Sauce, pickles, onion, whatever you're into — the Moon Rock crust carries the whole burger.

Dad's tip: This is the fastest cook in the lineup and one of the most addictive — Moon Rock on a hot smash patty builds a crust in under a minute. Great for a quick weeknight win when the smoker's not going.

Get Moon Rock Rub

Available at Woodlands Market · Mollie Stone's · United Markets · KenduSpice.com

Shop Moon Rock
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