Turn on the Vitamix and slowly increase the speed to the maximum.
Use the tamper to push down the ingredients if anything is stuck to the sides. Push it hard. Don't be afraid, the tamper will not reach the blades.
Vitamix usually needs at most 2 minutes to be ready. Per their website notes, you shouldn't process it more than 1 minute after the mixture is circulating freely.
When ready, use a silicone spatula to gently scrape all the yummy peanut butter out of the container.
If you have a food processor
Pulse a couple of times in the beginning before turning it on completely.
You must stop and scrape for a couple of times as the peanut butter will likely stick to the sides.
To make peanut butter in a food processor you need more time than with a Vitamix. If the mixture or the food processor gets too warm, stop and continue only after everything has cooled down.
Be patient! Depending on the power of your food processor, you might need 5-10 minutes to get the buttery consistency.
Video
Notes
BONUS! Homemade Plant-based Nut MilkLeave 1 Tbsp peanut butter in the blender and add 2 cups water. Optionally, you can add a bit of maple syrup and vanilla extract. Blend it for 1-2 minutes, and you have fluffy, creamy peanut milk. See, nothing goes to waste!