Melt the butter in a saucepan over medium heat until it’s smooth. Add the finely chopped onion and minced garlic, stirring to combine. Cook for about 10 minutes on low heat, letting the onion soften and the garlic release its flavor.
3 tablespoons butter, ¼ cup onion, 3 garlic cloves
Next, stir in the dried thyme and fresh rosemary, cooking for about a minute until fragrant. Sprinkle the flour over the onion and garlic mixture, stirring constantly to form a thick paste, or “roux.”
1 teaspoon dried thyme, ¼ cup flour, 1 teaspoon fresh rosemary
Then gradually whisk in 2-3 cups of stock. Bring mixture to a boil, then reduce heat slightly and simmer until thickened, about 5 minutes.
3 cups chicken or turkey stock
If the gravy is too thick, add more broth to smooth.