Toast the almonds in the oven at 150℃ / 300°F for 15-20 minutes until they smell nutty. You can toast them in a frying pan over low heat as well, just make sure you stir them occasionally to let them get toasted evenly.
Let the almonds cool down a bit before we move on.
Add the cooled almonds to a blender. (I use a small 32oz container of the Vitamix for this recipe. See note for the larger container.) Blend the toasted almonds with a tamper pushing down the four corners of the container until smooth. If you notice it becomes a paste and the blade doesn't get to blend the almonds, stop and scrape down the sides as needed.
Once your almond butter is done, pour into an air-tight jar. Let it cool down and store in the fridge.