Questions & Answers about Esta salsa lleva mayonesa, ajo y un poco de pimienta.
Yes, llevar often means to carry, to take, or to wear, but in food contexts it very commonly means to contain, to have in it, or to be made with.
So:
Esta salsa lleva mayonesa, ajo y un poco de pimienta.
means something like:
- This sauce contains mayonnaise, garlic, and a little pepper.
- This sauce is made with mayonnaise, garlic, and a little pepper.
This use is very common in recipes and restaurant descriptions in Spain.