Gather your ingredients and tools > Measuring cups and spoons, blender or food processor, storage jars.

Place basil, garlic and walnuts in blender. Pulse until roughly chopped.

Using the "chop" setting on your blender, add the olive oil in a drizzle to the chopped ingredients. 

Once all of the oil is added and combined, add the Parmesan cheese, salt, pepper and lemon juice. 

Mix well. Your pesto is ready when it resembles a coarse peanut butter. 

Transfer from blender to storage jars.