A real molcajete is carved from volcanic stone: it feels heavy for its size, it has rough pores of every size, and it sheds dark grit the first time you grind rice in it. A fake one is usually molded cement that looks too smooth and too even. Before you buy, check the weight, the pores and the shape. When it arrives, do the water test and cure it, and you will have your answer.
What a real molcajete is made of
A real molcajete is volcanic stone, also called lava rock or basalt. When lava cools, gas bubbles leave little holes all through the rock. Those holes are the pores that grip garlic, chiles and spices, and they are the reason a molcajete grinds so much better than a smooth bowl.
The bowl, the three legs and the temolote (the pestle) should all be the same stone. A carved piece is never perfectly even, so no two look exactly alike. If you are new to the tool, our guide to what a molcajete is and how it compares to a granite mortar covers the basics.
Fakes are usually cement, or a mix of cement and stone, shaped in a mold. The problem is not only how they look. Cement wears down as you grind, and the sand and gravel in it can end up in your guacamole. A cement molcajete is not one to cook with: if you find out you have one, return it.
5 tests to tell a real molcajete from a fake
No single test is perfect, and some of these are home checks passed from kitchen to kitchen, not lab tests. Use them together. The first three work before you buy, even from photos. The last two are for when it is home.
1. Feel the weight
Volcanic stone is heavy. Our classic 8 inch molcajete, about 8 inches wide and 5 inches tall, weighs 7 to 8.8 lb. If a molcajete that size feels light in your hands, or the listing gives no weight at all, ask before you buy. Something that seems too light for its size may be another material.
2. Look closely at the pores
Real lava rock has small, irregular holes of different sizes, scattered with no pattern, and the surface feels rough under your fingers. Cement looks smoother, and its holes tend to look alike, almost as if they were stamped. Very uniform pores are the classic sign of a cement piece.
3. Check the shape and the legs
A molcajete carved from stone is rarely perfectly symmetrical. One leg may be a little thicker, the rim a little uneven, the inside a little off center. That is a good sign. A piece that looks flawless, and exactly like the one next to it on the shelf, probably came out of a mold. Check that the legs and the temolote look like the same stone as the bowl.
4. Try the water test
This one is folk advice, but many families swear by it. Pour a little water into the bottom of the bowl and wait a few minutes. A real molcajete usually holds most of it, although a very porous one may let a little seep through. A cement one tends to soak it up fast and become evenly wet. When you finish, let the stone dry completely.
5. Watch for grit when you cure it
This is the test that settles most doubts. New volcanic stone sheds loose grit as soon as you start grinding, so the first rounds of rice come out gray. After a few more rounds, the rice stays white. That grit is loose volcanic stone, and seeing it is good news. If a molcajete keeps crumbling round after round instead of getting cleaner, look at it again with the other tests.
Two more checks people use
- The scratch test: on a molcajete you already own, scratch a hidden spot underneath with the tip of a knife. A deep mark points to cement or a cement and stone mix. Volcanic stone may only give off a little dust.
- The tap test: knock gently on the side with your knuckle or the temolote. Volcanic stone gives a solid, deep sound. Cement tends to sound more hollow.
Red flags when you shop online
Most molcajetes today are bought from a photo. These are the details that should make you look twice:
- No weight in the listing, or a weight that seems light for the size.
- A very low price for a big molcajete. Real stone is heavy to ship and takes work to carve.
- An inside that looks smooth, shiny or painted. The grinding surface should be bare, rough stone, with no glaze or sealant.
- A description that never names the stone. Look for clear words: lava rock or volcanic stone, no cement, no sealants, no glue.
- The word granite. A granite molcajete is a granite mortar shaped like a molcajete. Granite is a good stone for a mortar, but it is not volcanic stone, so it grinds and feels different.
- Reviews about grit that never stops, a bowl that crumbles or legs that break off.
Molcajete sizes: which one should you buy?
The right size depends on how many people you feed and whether you want to grind, serve or both. For most home kitchens, a bowl that holds about 1.5 to 4 cups covers everyday cooking. Here is how to choose:
- 8 inch, for everyday cooking for 2 to 4 people. About 8 inches wide and 5 inches tall, 7 to 8.8 lb. Big enough for a family batch of salsa or guacamole, and still easy to lift to the sink. It is the size most of our customers choose.
- 10 inch, for parties and a crowd. A full 10 inches across, with room for enough guacamole or salsa for a crowd. It is the one for parties, taquerías and catering. It is bigger and heavier, so give it a permanent spot on the counter.
- Heart, 6 inch interior, for serving. Holds nearly 2 cups and stands on 3 legs, so it goes from grinding to the table as a serving bowl for guacamole, pico de gallo or queso.
Weight matters more than people expect. A heavy molcajete stays steady and grinds with less effort, but it is also harder to lift and clean. Pick the size you will actually use every week. Natural stone varies, so size and weight can change slightly from piece to piece.
Not sure where to start? Our classic Mexican molcajete comes in both sizes. The 8 inch comes with its temolote and a traditional embroidered tortilla warmer. The 10 inch comes with its temolote and a booklet with recipes and care instructions.
Shapes for serving and gifting
Once you have your everyday molcajete, a second one in a fun shape earns its place on the table. All of these are volcanic stone, handmade in Mexico:
- Heart molcajete with 3 legs: pure lava stone with no sealants or cement. It arrives gift ready in a box with a recipe leaflet, for weddings, housewarmings and Valentine's Day.
- Pig molcajete: the cochinito shape in volcanic rock, a true guacamole maker that rinses clean with water and a brush.
- MEXICO and USA molcajetes: 8 inch molcajetes with the word MEXICO or USA carved on them, for families who carry Mexico in their hearts and call the USA home.
You can see every shape and size in our molcajete collection.
What to do when your new molcajete arrives
- Unbox it and look it over: rough pores, solid legs and a temolote of the same stone.
- Scrub the bowl and the temolote with a stiff brush and water. No soap.
- Do the water test if you want peace of mind, then let it dry.
- Cure it: grind 1/4 cup of dry white rice at a time until the rice stops coming out gray, then grind garlic and coarse salt into a paste and leave it inside overnight.
- Rinse, let it dry, and make a simple salsa first. The stone grinds smoother with every use.
The full method, with amounts and the signs that tell you it is ready, is in our guide on how to season a molcajete. Our classic molcajete also includes a QR code: scan it and the step by step curing guide arrives by email. If your first salsa still tastes a little gritty, that is normal: grind one more round of rice.
Real lava rock, never concrete
Every molcajete here is volcanic stone, handmade in Mexico, with a guide to cure it before your first salsa.
Free US shipping on orders over $35.
Frequently asked questions about real and fake molcajetes
How can you tell if a molcajete is real?
Check the weight, the pores and the shape. A real one is heavy for its size, has irregular pores of different sizes and is a little uneven because it is carved. At home, the water test and the gray rice when you cure it confirm it.
Is a cement molcajete safe to use?
It is not a good idea to cook with one. Cement wears down as you grind, and sand and grit can end up in your food. If you find out yours is cement, return it and get one of real volcanic stone.
Is a granite molcajete a real molcajete?
Not in the traditional sense. A granite molcajete is a granite mortar shaped like a molcajete: it grinds, but it is not volcanic stone. A traditional molcajete is lava rock, with the rough pores that give salsa its texture.
How heavy should a real molcajete be?
Heavy for its size. As a reference, our 8 inch molcajete of lava rock weighs 7 to 8.8 lb. Natural stone varies a little from piece to piece, but an 8 inch molcajete that feels light deserves a second look.
Why does my new molcajete leave grit in my food?
Because it still needs curing, and that is a good sign that it is real stone. Grind dry rice until it comes out white, then garlic and salt. If a little grit shows up in your first salsa, grind one more round of rice.
What size molcajete is best for guacamole?
For a family, an 8 inch molcajete is plenty. For a party, go with a 10 inch, which holds enough guacamole for a crowd. To serve at the table, the heart molcajete with its 6 inch interior holds nearly 2 cups.
Sources
- Food Republic: How to test the authenticity of your molcajete
- The Daily Meal: The telltale sign that your molcajete is the real deal
- Mexico News Daily: Learn how to molcajetear like a Mexican
- Gastrolab: Cómo identificar un molcajete tradicional
- America's Test Kitchen: Mortars and Pestles equipment review