We may earn a commission from links on this page.I typically hesitate to suggest making peanut butter in blenders, but the Vitamix Ascent X5 is the exception. It's the best blender I've ever tried, and you should definitely make nut butters with it. Not only is it the absolute fastest nut processor I’ve ever tested (under a minute in some cases), but the resulting peanut butter is incredibly smooth. Here’s how to make any nut butter in the Vitamix Ascent X5.How to use the nut butter function on the Vitamix1. Prepare the nuts, if neededI like to roast the nuts in the oven first, because I love the sweet, toasty flavor. To do it, spread out your nut of choice (I used walnut pieces today) on a baking sheet in a single layer, and put the sheet pan in a 350°F oven for five to 12 minutes. This time will vary depending on the nut, the size of the pieces, and thickness of the sheet pan, so use your nose as your guide. As soon as you start to smell toasted nuts, give them a stir with a wooden spatula and assess if you need a few more minutes. They should be golden with no burnt areas. Allow the nuts to cool on the sheet pan for at least 10 minutes. If you prefer raw nut butters, though, skip this step and start at step two.2. Add the nuts to the Vitamix container Credit: Allie Chanthorn Reinmann Pour the nuts into the container and snap the lid on, but keep the middle plug lined up with the notches (see picture) so it’s easy to un-stopper. You’ll need to use the tamper to assist the nuts (the tamper is that black plastic baseball bat-looking thing that came with the Vitamix Ascent X5), smashing them down toward the blade during the one minute blend time. It’s best to have it right next to the blender—the preset timer goes by before you know it. 3. Select the nut butter preset  Credit: Allie Chanthorn Reinmann Press the button on the left above the knob that has three horizontal lines. The screen will display several cute little cartoons of food. Rotate the knob until you see a jar with a peanut inside. Press the play button directly to the right of the knob.4. Tamper for your life Credit: Allie Chanthorn Reinmann Once the engine kicks on, the initial kick-up of nut particles will pass after a second or two. Then you can unstopper the center plug and use the plastic tamper to jam the nuts down into the blades. The engine will kick up another speed level and you’ll hear it, but don’t let it stop your tampering. If you’re ever in doubt of when to start pressing, you can look at the screen. There’s a little tamper icon with a downward arrow signaling that tampering is necessary. The tamper icon appears to the left of the timer. Credit: Allie Chanthorn Reinmann For a chunky butter, stop the machine after 30 or 40 seconds by pressing the same start/stop button to the right of the dial. Unplug the machine and stir the mixture to see if it’s the consistency you like. If you like a smoother nut butter, let it run for the full minute. To get an even silkier nut butter, you may want to add another 15 seconds by pressing the “+:15” button, which is on the right side above the rotating dial. But generally, once the initial minute is up, you have nut butter. That’s all it takes. Credit: Allie Chanthorn Reinmann If you want to get a little creative, you can add a few fun ingredients. I decided to make Rum Raisin Walnut Butter today, so after the first nut butter blend finished, I added some dark rum, raisins, a touch of honey, and a bit of salt. I selected the nut butter preset again, did some tamping, and stopped the blend after about 20 seconds to incorporate the new ingredients and smooth out my walnut butter. Of course, you could keep yours low key with just a pinch of salt and some cinnamon, for example.  Once I emptied my walnut butter into a glass container, I added warm water and a drop of soap to the container. (Don’t go higher than half full, the blender will swish the water aggressively.) Click the little button in the center with the image of bubbles and let the blender clean itself. This setting is mostly meant to get the blades clean, so don’t get frustrated if some peanut butter smears are still hanging out on the sides of the container. Just bring it over to the sink and carefully wash the sides. Credit: Allie Chanthorn Reinmann If you’ve never made walnut butter before, I highly suggest it. This spread turned out buttery-smooth with a salty and bitter edge, and it makes an excellent partner for jam. You can also increase the honey or raisins if you want it to be sweeter. Rum raisin walnut butter recipeIngredients:350 grams (3 cups) walnut pieces35 grams (1/4 cup) raisins1 tablespoon dark rum1 teaspoon honey¼ teaspoon salt1. Roast the walnut pieces in a 350°F oven for five to 12 minutes, or until lightly browned and fragrant. Allow to cool to room temperature for at least 10 minutes.2. Pour the walnut pieces into the Vitamix Ascent X5, add the lid, and select the nut butter setting. 3. Press start, remove the central stopper on the lid and use the tamper to press the nuts down into the blades.4. With the machine off, add the raisins, rum, honey, and salt. Put the lid back on and start the nut butter setting again. Tamper the mixture as it blends for another 20 seconds. Stop the machine. Scoop the nut butter into a container with a tight-fitting lid. Enjoy your new nutty spread on toast, with cake, with yogurt, or over granola.