Drain oil through a fine strainer or several thicknesses of cheesecloth. Discard solids.
* There is approximately ¾-1 cup of basil leaves in a typical grocery store plastic container. The more basil you use, the more intensely basil-y the oil will taste. Trader Jo's has a wonderful, large package of basil for a very reasonable price.
**Don't try to use all olive oil. The flavor is too strong and will take away from the delicious basil flavor. A bit of olive oil adds a richness to the finished oil.