How-To Guides
Everything you need to start cooking well and make smart cookware decisions — written for real beginners and improving cooks.
Cast Iron Skillet Identification: Foundry Marks, Gate Marks and Era Registry
Flip the pan over and look for a raised bar running edge to edge across the base. That is a gate mark, and it dates the casting to roughly pre-1890 on its own, before you read a single letter. If there is no gate mark, the identification order that works is heat ring, then handle profile, then cooking-surface finish, then mark style — and a completely unmarked pan is still placeable to a decade by mass and rim wall thickness alone.
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Is My Cast Iron Ruined? Damage Triage for Cracks, Warp, Pitting and Flaking
Two conditions genuinely retire a cast iron pan: a crack that goes all the way through, and rust that has eaten through the section. Everything else — pitting, flaking, warp, grey scale, black residue, a rocking base — is either cosmetic or restorable. You tell them apart with a straightedge, a set of feeler gauges and a ring test, not by eye.
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Best Oil to Season Cast Iron: Cured-Film Hardness Across 15 Fats
Use grapeseed or plain canola. Both sit in the semi-drying band with iodine values around 110-145, which builds a film hard enough to resist a metal spatula and flexible enough not to shed in sheets. Flaxseed produces the hardest and glossiest film of anything on the shelf and is also the most notorious flaker, because a highly cross-linked coating carries internal stress it eventually resolves by letting go of the iron.
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How to Season Cast Iron: Oven Temperature and Coat Schedule by Pan Class
Wipe on a semi-drying oil, wipe it back until the pan looks dry, and bake at 450-465°F for 60 minutes with the pan upside down on the middle shelf. Cool it in the closed oven. Repeat until the surface closes — three or four coats on a machine-ground face, five or six on a coarse sand-cast one. The target temperature is the oil's smoke point plus 25-50°F, which is why the oil you choose sets the oven dial.
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Cast Iron Sticky After Seasoning: Eight Causes Diagnosed by Feel
Tacky all over means the oven never reached polymerisation temperature. Gummy patches mean too much oil. Sticky only when hot means an under-cured film; sticky only when cold usually is not seasoning at all, it is cooking-fat residue. Only one of the eight faults on this page needs a full strip, and it is the one caused by using a non-drying oil.
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Rust Removal on Cast Iron: Method Table by Rust Depth
Grade the rust by depth before you pick a method. Surface bloom comes off with coarse salt and oil in ten minutes; heavy scale and pitting want electrolysis, which removes oxide and no sound metal at all. Vinegar works and is the method that eats pans, because once the oxide is gone the acid starts on the iron underneath — 30 minutes maximum on a thin vintage casting, checked every ten.
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Can You Use Soap on Cast Iron? Nine Cleaning Methods Measured Against Seasoning Loss
Yes. Modern dish detergent is a surfactant with a pH around 7 to 9 and it cannot dissolve a polymerised seasoning film — the never-soap rule dates from lye soap with free alkali still in the bar. What genuinely strips a cured film is strong alkali above about pH 12, pyrolysis above roughly 700°F, and abrasion, which is why the oven self-clean cycle and a dishwasher cycle both take a pan back to grey iron while a bottle of Dawn does not.
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Cast Iron Skillet Size Chart: Number, Rim Diameter, Cooking Surface and Weight
The number cast into a vintage pan is a wood-range stove-eye size, not an inch measurement, and the inch figure on a modern pan is the outside rim diameter. Both overstate the flat floor you cook on by roughly 1.7 to 2.4 inches, and a machined vintage No. 8 gives you more usable surface at a pound less weight than a modern 10.25-inch pan of the same nominal class.
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Cast Iron Dutch Oven Size Chart: Quarts, Interior Dimensions and What Actually Fits
Quart capacity measures water to the brim and tells you nothing about whether a 4 lb chicken clears the lid. Interior diameter and wall height are the specs that decide, and the practical answer for most households is 5.5 quarts at roughly 10.2 inches interior diameter and 4.6 inches deep — the smallest size that takes a 2 lb boule with oven-spring headroom and a 4 lb bird without wedging it.
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Bare Cast Iron vs Enamelled vs Carbon Steel: 18 Measured Differences
Carbon steel is roughly 25 to 40% lighter at the same diameter and reaches 400°F in about half the time, but drops 110 to 160°F when a cold steak lands on it against 60 to 90°F for bare cast iron. Enamelled cast iron carries the same iron mass with a glass skin that conducts at 1 to 2 W/m·K against the iron's 46 to 55, which costs it surface responsiveness and buys it complete acid tolerance.
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Cast Iron Brands Compared: Wall Thickness, Weight and Surface Finish by Maker
Three specs separate every current maker: surface finish (sand-cast, machined or polished), rim wall thickness (2.4 to 4.6 mm), and mass at a given diameter (4.0 to 8.1 lb for a 10-inch pan). Those three predict release, thermal response and how the pan feels in one hand better than any brand story, and the makers charging the most are mostly selling you the first spec.
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Cast Iron on Glass, Induction, Electric and Gas: Heat Source Compatibility Table
Yes, with three conditions: lift the pan rather than sliding it, keep the setting at or below medium-high, and check the base is flat within about 0.5 mm across its diameter. On glass-ceramic the failure mode is a damaged cooktop rather than a damaged pan, and gate-marked or heat-ringed vintage pans are the ones that scratch, because only a raised ring or scar touches the glass.
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