Can I cook a frozen chuck roast in the Instant Pot?
You can, but you will lose the sear, which means less flavor. If cooking from frozen, skip searing and cook at High Pressure for 80 to 90 minutes (for a 3 to 4 pound roast), then do a 15 to 20 minute natural release. If it is still not fork-tender, put it back under pressure for 10 to 15 minutes more and natural release again. Add veggies after the meat is tender using the same method in the recipe.
Why is my roast still tough?
It usually just needs more time. Chuck gets tender when the connective tissue breaks down. Cut the roast into 2 to 3 large chunks and pressure cook an extra 10 to 15 minutes, then natural release again. (This is about fork-tender and shreddable, not hitting a specific temperature.)
How much liquid do I need?
Most 6-quart Instant Pots need at least 1 cup of thin liquid to come to pressure. This recipe uses more so you end with enough gravy.
Can I skip the potatoes and carrots?
Absolutely. Cook the roast as written, then serve with mashed potatoes, rice, buttered noodles, or crusty bread. If you skip the veggies, you can reduce the sauce a little longer for extra richness.
What is the best size roast for this?
A 3 to 4 pound chuck roast is the sweet spot for a 6-quart pot. Bigger roasts can work, but I recommend cutting them into large chunks so the center cooks evenly.
Can I make it gluten-free?
Yes. Use a gluten-free Worcestershire and thicken with cornstarch (already included as an option) instead of flour.