What makes this béchamel “light”?
Two things: we use a smaller amount of roux per cup of liquid than a classic béchamel, and we swap part of the milk for broth. You still get body and that silky texture, but it lands lighter on the palate.
Is it thick enough for lasagna or a baked pasta?
This base recipe is designed as a pourable, coating sauce for vegetables and pasta. If you want a casserole-style binder (lasagna, stuffed shells, thick bakes), increase the roux: use 3 tablespoons butter + 3 tablespoons flour for the same 2 cups liquid for a medium-thick sauce, or 4 tablespoons butter + 4 tablespoons flour for a thicker, bake-ready sauce. Simmer until it coats the back of a spoon.
Will it taste like mushrooms?
If you keep the mushroom powder modest, it reads as savory and earthy, not mushroom-forward. If you are nervous, start with 1 teaspoon and taste.
Can I make it gluten-free?
Yes. Use a gluten-free all-purpose flour blend that is meant for thickening. Cook the roux for a minute or two, then whisk in the liquid slowly and keep whisking until smooth.
Can I make it dairy-free?
You can. Use unsweetened, unflavored oat milk (best texture) and olive oil or vegan butter for the roux. It will be slightly less creamy but still very sauce-able.
My sauce got lumpy. Am I doomed?
Nope. Whisk aggressively while warming, or pour it through a fine-mesh strainer. For stubborn lumps, use an immersion blender for 10 to 15 seconds.
How thick should béchamel be?
For coating pasta and veggies, you want it like light gravy. For a bake that needs to hold its shape, use the thicker roux option above and simmer a minute or two longer.