Combine all your goodies: Dump the pumpkin puree, granulated sugar, brown sugar, and pumpkin pie spice right into your slow cooker. No fancy bowls needed!

Give it a good stir: Grab a spoon and stir everything together until it's all beautifully combined. Make sure there are no dry spots of spice or sugar hiding.

Let the slow cooker do the work: Pop the lid on your slow cooker and set it to LOW. You'll want to let it cook for about 6 to 8 hours. I like to give it a stir every hour or so, especially in the last couple of hours, just to make sure it's cooking evenly and not sticking.

Watch it transform: As it cooks, you'll notice the pumpkin butter will thicken up nicely and its color will deepen to a gorgeous, rich, caramel-y hue. It's like watching autumn itself simmer in your kitchen! When it’s thick enough to coat the back of a spoon and looks wonderfully spreadable, it's ready.