How do you keep flour from clumping in gravy?

1. Whisk the flour and liquid together. Before adding the flour to the hot liquid, whisk it together with a small amount of cold liquid until a smooth paste forms. This will help to prevent the flour from clumping when it's added to the hot liquid.

2. Add the flour gradually. Don't add all of the flour at once, or it's more likely to clump. Instead, add it gradually, whisking constantly.

3. Bring the liquid to a simmer before adding the flour. This will help to prevent the flour from cooking too quickly and clumping.

4. Stir constantly. Once you've added the flour, stir the gravy constantly until it has thickened. This will help to prevent the flour from settling to the bottom of the pan and clumping.

If you do end up with clumps in your gravy, you can try to strain them out using a fine-mesh sieve.