kirkland signature mixed nut butter kirkland signature kirkland signature mixed nut butter is crafted from dry roasted almonds and cashews that are ground into a delicious butter and blended with flax, chia, and pumpkin seeds to bring you a nut butter that is simple and full of flavor. aside from being eaten right out of the jar, kirkland signature mixed nut butter is also great for dipping fruits and vegetables or spreading on toast and sandwiches.