Run Sheet · No. 4 · St. Louis Spares · The 3-2-1 Autopsy

Two Racks

Two St. Louis-cut spare racks on the recteq Deck Boss 900 — cook No. 4, after the July 4 butts and the drumline legs. Every rib cook eventually answers the same question: 3-2-1, or not? Here: not. Classic 3-2-1's two-hour foil stage was built for thinner baby backs decades ago, and it oversteams STL spares into mush. The pick is a modified wrap — hotter and shorter, “2¼–1–½” at 250°F: smoke unwrapped until the bark sets, foil for 45 minutes to an hour only, then an uncovered bark reset before the pull. Total run time ~4–4.5 hours, built backward from a 6 PM serve. The no-wrap lane runs alongside as the legitimate alternative — slower, no schedule insurance, but not a compromise.

Pit temp 250°F the modified-wrap pick

Smoke unwrapped 2–2.5 hr until bark sets

Foil wrap 45 min–1 hr not two — butter + honey

Bark reset 30–45 min uncovered, after unwrap

Pull at 200–203° bend + toothpick, feel first

Total cook ~4–4.5 hr 2 racks, 6 PM serve

The Verdict

The one decision that shapes everything else: wrap, or don't. Skip classic 3-2-1 at 225°F — two full hours in foil overshoots STL spares into mush. Meathead calls the 2-hour foil stage “far too long,” and pit veteran Sterling Ball's line is that he wants to “kill the man who came up with the 3-2-1 concept.”

The pick

Modified wrap — “2¼–1–½” at 250°F

Deck Boss at 250°F — pellet convection runs dry; the extra 25° over 225 buys back the time foil would otherwise steal, and stays clear of the Lo setting's documented ~25° swing.
Smoke unwrapped 2–2.5 hr until the bark is set: mahogany, tacky-not-wet.
Foil wrap 45 min–1 hr ONLY — not two — butter + honey + light brown sugar inside.
Unwrap, 30–45 min bark reset, uncovered.
No spritz. Four touches total — on, wrap, unwrap, sauce. The foil hands back whatever moisture the fan takes; the pellet pit is an easy-bake oven on purpose.
Total ~4–4.5 hr; pull on feel around 200–203°F.

The other lane

No-wrap — legit, not a compromise

Meathead's “Last Meal Ribs” style — 225–250°F, 5–7 hr, a spritz every 45–60 min once bark sets, pull on the bend test around 200°F. Better bark, more smoke ring, no braised texture — but longer, needy (that spritz leash is real on a pellet fan), and zero schedule insurance. The babysitting lane, kept on the sheet for honesty, not for use.

The wrap lane is the house lane — a firm 6 PM and a four-month-old don't negotiate.

Deck Boss quirks The constant convection fan dries the surface and sets bark fast — the classic fix is a spritz leash; ours is letting the foil wrap do that job instead. Re-foil the drip pan before the cook; grease buildup spikes temps, per the recteq forum.

Prep

STL-cut usually arrives squared; grocery racks often still carry the membrane and a ragged flap. Peel the membrane always — a rubbery smoke-blocker otherwise.

Trim & dry brine overnight · uncovered

Peel the membrane, always — butter-knife a corner, paper-towel grip, one pull.
Square the taper, trim the hanging skirt and cartilage — the scraps go to beans or stock, not the trash.
Dry brine overnight per the drumline precedent: ¾ tsp kosher salt per lb, racked, uncovered in the fridge — a slight bark edge over salting same-day, though salt-in-the-rub same-day is also defensible.
Binder: thin mustard or oil — cosmetic glue only.

The rub lower sugar · 2 racks

2 tbsppaprika
1 tbspgarlic powder
1 tbsponion powder
2 tspblack pepper
1 tspchili powder
1–2 tspbrown sugar
pinchcayenne

Lighter on sugar than the two-butts rub, on purpose — sugar scorches past 275°F and invites bitter edges by hour three, even at 250.

The Cook

The modified-wrap lane, step by step — the same logic carries over to the no-wrap lane minus the wrap itself.

250°F, meat-side up the whole cook, bone side toward the heat.
No spritz, on purpose. Lid stays closed until wrap time — the foil returns the moisture a spritz would, without the every-40-minutes leash. Costs a shade of bark depth; a fair trade for a cook you don't babysit.
Wrap in foil, not butcher paper — the rib wrap is a short wet braise and foil seals it; paper's breathability is a brisket virtue, not a rib one.
In the wrap: butter + honey + light brown sugar (Malcom-style family). Honest note: the sweets shape glaze and mouthfeel, not tenderness — time and temp do that. They read right under a KC glaze.
Bark reset 30–45 min after unwrapping, uncovered.

The finish — decided

KC sauce tack

Brush a KC sweet-tomato sauce the last 10–15 minutes only and let it tack — any earlier and it scorches. This is Kansas City; ribs leave this pit glazed. (The dry “muddy” comp finish exists. It lives in other cities.)

Doneness — Feel Over Thermometer

Ribs don't have a magic number. Pull on these signals, in this order.

Bend test: tong-lift one end; the rack arcs into a U and the surface cracks. A limp flop is over, a clean snap is under.
Toothpick between the bones: it should slide like soft butter.
198–203°F internal, as a sanity check only — thin meat and bone conduction make any single probe reading a liar on ribs.

Rest 10–15 minutes loose — a vented tent at most — then slice. Carryover is modest here; the rest settles juices more than it pushes temp.

The Shape of the Cook

Expected internal temp from ribs-on to serving, modified-wrap lane. The cool bands are unwrapped smoke and the uncovered bark reset; the warm band is the foil wrap. The dashed line at 198° marks the low end of the doneness window — a sanity check, not the call. Hover the line for time and temp at any point.

On the pit Resting off the pit Times are planning estimates — the bend test decides.

Timeline

Built backward from a 6 PM serve, 2 racks. Build in 30–45 minutes of slack — the wrap trigger is bark color, never the clock.

Cook Day serve 6 PM

8:00 AM

Trim, membrane, rub

Dry brine was overnight — this morning is membrane, trim, and rub only.
Rub goes on now; ribs go back in the fridge, uncovered, until pit time.

1:15 PM

Pit to 250°F

Re-foil the drip pan first — grease buildup spikes temps.

1:30 PM

Ribs on, meat up 250°F

Meat-side up, bone side toward the heat, for the whole cook. Lid closed.

1:30–3:45 PMthe quiet hours

Nothing. That's the point.

Lid closed, no spritz on this sheet — the wrap does that job. Glance at the hopper once, then go be with the family. First real look is the wrap check.

3:45–4:00 PM

Wrap in foil

Butter + honey + light brown sugar inside. Go by bark color — mahogany, tacky-not-wet — never the clock.

4:45 PM

Unwrap; bark reset

Uncovered, 30–45 minutes. Skipping this steams the bark you just built back to pale and wet.

5:15–5:30 PM

Bend + toothpick test; pull 200–203°

Sauce now if running the KC lane — 10–15 minutes only, then let it tack.

5:30–5:45 PM

Rest loose

A vented tent at most — no cooler, no sealed foil.

6:00 PM

Slice between the bones, serve

Shopping & Staging

Checks save as you go on this device.

Meat

2 racks STL spares, 2.5–3.5 lb each — ~$4–5/lb, $25–35

Rub

Rub components, if not stocked — $5–8

Wrap & finish

Heavy-duty foil — ~$3
Butter, honey, brown sugar — ~$6
KC sauce, a bottle or two to blend — the finish is not optional here — $8–12

Pellets

4–5 lb pellets — ~1 lb/hr at 250°F; nothing against the hopper

Pitfalls

The five that ruin ribs, in the order they show up.

Will bite you

Mushy overwrap

3-2-1's sin — meat sloughs in strings, no chew. Cap foil at 45–60 minutes.

Sugar scorch

Near-black bitter patches, not mahogany. Keep the rub sugar light; sauce only in the last 10–15 minutes.

Membrane left on

A rubbery bone-side sheet the rub can't reach. Peel it before the rub, always.

Pulled too early

Tears with a fight, won't bend. Trust the bend and toothpick over the clock.

Steam-killed bark

A pale, wet surface after the wrap. Never skip the uncovered reset.