*If toasting the hazelnuts, place on a baking sheet and roast for 10-15 minutes at 350F. Watch carefully to be sure the skins don’t start to burn (your nose knows, too). Remove from the oven and place the nuts in a kitchen towel, folding up the corners of the towel to create a little pouch. Rub the hazelnuts together in the towel until most of the skin flakes off, then transfer the nuts to the blender, leaving as much of the skins behind as possible. Afterward, don’t forget to turn up the oven temp to 375F to bake the muffins! 🙂