Prepare the apples: Peel, core, and slice the apples into even pieces. The more uniform the slices, the more evenly they'll cook. Add the sliced apples directly into the slow cooker, filling it almost to the top. This is the cozy base of your slow cooker apple butter.

Add sugar and spices: Sprinkle the granulated sugar, brown sugar, cinnamon, nutmeg, cloves, and salt over the apples. Use a wooden spoon to gently toss everything together until the apples are evenly coated in the sweet, warm spices. The mixture should already smell like fall comfort.

Cook low and slow: Cover the slow cooker with the lid and cook the apples on LOW for 8–10 hours, stirring once or twice if you can. The apples will soften, darken, and begin to break down into a thick, fragrant mixture that looks rich and caramelized around the edges.

Blend until smooth: Once the apples are very soft, use an immersion blender directly in the slow cooker to puree the mixture until completely smooth and velvety. If you don't have an immersion blender, you can carefully transfer the mixture in batches to a regular blender, then return it to the slow cooker.

Thicken the apple butter: Stir in the vanilla extract, then place the lid back on the slow cooker slightly ajar so steam can escape. Continue cooking on LOW for another 1–2 hours, stirring occasionally, until the apple butter is thick, glossy, and spreadable. It should mound softly on a spoon without being runny.

Cool and store: Turn off the slow cooker and let the apple butter cool slightly. Spoon it into clean jars or airtight containers. Once completely cooled, seal the jars and store them in the refrigerator. The slow cooker apple butter will thicken even more as it chills, becoming perfectly smooth and spreadable.

Serve and enjoy: Spread your homemade apple butter on toast, biscuits, muffins, or pancakes, or swirl it into oatmeal and yogurt. Every spoonful is sweet, spiced, and comforting—like a little taste of autumn in every bite.