Flat pack charcoal, explained
The collapsible BBQ grill, from flat pack to first sear
A collapsible charcoal grill is a stack of steel plates that locks into a firebox by hand and comes apart again for the trunk or the shelf. These guides cover how that works, how to light and manage a fire in one, how to care for raw carbon steel, and what to cook. Every guide is written around the Slot Grill, a tab-and-slot carbon steel grill made in Buna, Texas.
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How Collapsible Grills Work
Tab-and-slot construction, carbon steel, steel gauge, airflow and what separates a flat pack grill from other portable charcoal grills.
What Is a Collapsible Charcoal Grill?
A plain-English explanation of collapsible (flat pack) charcoal grills: how the plates lock together, why they pack flat, and what they do well.
How Tab-and-Slot Assembly Works
Why tab-and-slot steel holds together under heat without bolts or hinges, and what to check each time you assemble a flat pack grill.
Flat Pack vs Hinged vs Fixed Charcoal Grills
How flat pack, hinged and fixed portable charcoal grills compare: why separate panels with no hinges hold up better, where hinged grills wear out, and when a fixed grill makes sense.
Carbon Steel Grills Explained
What carbon steel is, why it is used for collapsible grills, how it differs from stainless, and why it needs seasoning.
Steel Gauge and Why It Matters on a Portable Grill
What 10-gauge and 12-gauge mean, why thicker steel holds up better in a collapsible grill, and how gauge affects weight.
Air Gap and Airflow in a Collapsible Grill
How the space under a flat pack grill's coal bed affects airflow, heat on the surface below, and how to set up safely on a table or tailgate.
Setup & Fire
Putting a flat pack grill together, lighting it, building heat zones, feeding the fire and cooking on grates, griddle plates and cast iron.
Setting Up a Collapsible Grill: First Setup, Step by Step
The exact assembly order for a tab-and-slot collapsible charcoal grill, where to put it, and how to take it back down, using the Slot Grill.
Your First Cook on a Collapsible Grill
A low-stress plan for the first fire on a new flat pack charcoal grill: what to cook, how much charcoal, and what to watch for.
Lighting Charcoal in a Flat Pack Grill
Chimney starters, fire starters and other clean ways to light charcoal in a collapsible grill, and why to skip lighter fluid.
How to Build a Two-Zone Fire in a Collapsible Grill
The single most useful fire layout for a lidless flat pack grill: hot side for searing, cool side for finishing, and how to size it.
Adding Charcoal During a Long Cook
How to keep a collapsible grill going for longer cooks: when to add fuel, lit vs unlit coals, and how to do it safely.
Cooking With Wood in a Collapsible Grill
Using clean cooking wood instead of (or with) charcoal in a flat pack grill: which woods, how to burn down to coals, and how to cook over them.
Recipes
Recipes written for the cooking area of a collapsible grill, with fire setup, timing and safe internal temperatures.
Smash Burgers on a Collapsible Grill Griddle Plate
Crispy-edged smash burgers on a carbon steel griddle plate over charcoal, sized for a collapsible grill.
Juicy Chicken Thighs on a Collapsible Grill
Boneless or bone-in chicken thighs on a flat pack charcoal grill using a two-zone fire, with a simple spice rub.
Grilled Pork Tenderloin on a Collapsible Grill
A whole pork tenderloin seared over charcoal and finished on the cool side of a flat pack grill, to a safe and juicy 145°F.
Griddle Breakfast on a Collapsible Grill
Bacon, eggs and potatoes on a carbon steel griddle plate over charcoal: a camp breakfast plan for a flat pack grill.
Chicken and Vegetable Kebabs on a Collapsible Grill
Skewered chicken and vegetables sized to fit across a flat pack grill, with a lemon-garlic marinade.
Grilled Salmon on a Collapsible Grill
Skin-on salmon fillets cooked over charcoal on a flat pack grill or griddle plate, with tips to stop sticking.
Care & Storage
Seasoning, cleaning, rust, ash and packing a carbon steel grill flat for the shelf or the trunk.
Seasoning a New Carbon Steel Collapsible Grill
How to season a raw carbon steel flat pack grill before first use, what oil to use, and how to build up the coating.
Cleaning a Collapsible Grill After a Cook
A five-minute routine for cleaning grates, griddle plates and the firebox of a flat pack charcoal grill so it's ready next time.
Surface Rust on a Carbon Steel Grill: Prevent It and Fix It
Why carbon steel grills rust, why light surface rust is cosmetic, and how to clean and re-season a collapsible grill.
Packing Flat and Storing a Collapsible Grill
How to pack a collapsible charcoal grill flat, keep soot off your gear, and store it between seasons.
Charcoal Ash: Safe Handling and Disposal
How long charcoal ash stays hot, how to put it out, and how to dispose of it from a collapsible grill safely.
Choosing a Collapsible Grill
Who a collapsible charcoal grill suits, what to look for, how to size one and how the two Slot Grills compare.
Who a Collapsible Charcoal Grill Suits (and Who It Doesn't)
An honest look at who gets the most from a flat pack charcoal grill: campers, tailgaters, small-space cooks, hunters and more.
Collapsible Grill Buying Checklist
What to check before you buy a collapsible charcoal grill: steel thickness, packed size, setup, airflow, cooking area and where it's made.
Sizing a Collapsible Grill for Your Group
How much cooking area you need for one, two, four or a crowd, and how to cook in batches on a smaller grill.
Compact vs Full Size Slot Grill: Which Collapsible Grill Fits You?
A side-by-side comparison of the Slot Grill Compact and Full Size: steel, weight, cooking area, air gap, packed size and price, from SlotGrill.com.
Collapsible Grills for Small Spaces: Patios, Balconies and Small Yards
How a flat pack charcoal grill can work for small outdoor spaces, plus the rules and safety checks to make first.
About & Reference
About this site, Slot Grill, the glossary and the full FAQ.
About Collapsible BBQ Grill
Who publishes Collapsible BBQ Grill, what the site covers, and how product facts are sourced from SlotGrill.com.
Collapsible Grill Glossary
Plain definitions of terms used for collapsible and flat pack charcoal grills, carbon steel care and charcoal cooking.
Where to Buy a Genuine Slot Grill
Where authentic Slot Grills are sold, and how to tell an official Slot Grill account from an imitator.
Collapsible Grill FAQ
Answers to common questions about collapsible charcoal grills, setup, fuel, seasoning, rust and the Slot Grill.
The two Slot Grills, side by side
Both are tab-and-slot, carbon steel, made in Texas. Full comparison →