Start by removing your fully cooked spiral ham from its packaging. If your ham came with a glaze packet, set that aside. We’re making our own glaze, and trust me, it’s going to be delicious! Place the ham into your crockpot with the cut side facing down. This is important because it helps keep the ham juicy while it heats.

Open your 20-ounce can of pineapple slices in 100% pineapple juice. Pour all the juice from the can into the crockpot around the ham. Set the pineapple slices aside because we’re going to use them later when we finish the ham in the oven.

Take your 3 tablespoons of Dijon mustard and spread it all over the ham. Get it on the sides and across the top. Next, take your ½ cup of softened salted butter. Do not melt your butter! You want it softened enough that you can smear it right onto the ham. I literally just took the butter and pressed and spread it all over. Then pour your 1 cup of honey all over the ham.

Place the lid on your crockpot. If your ham doesn’t quite fit, refer to my aluminum foil trick above, provided your slow cooker manufacturer permits it. Cook on LOW for approximately 4–5 hours, or according to your ham’s reheating instructions, until the appropriate internal temperature is reached. Remember, your ham is already cooked! We want to gently reheat it and keep it juicy and tender.

Once your ham is heated through, carefully remove it from the crockpot. I like using a disposable foil roasting pan, the kind you might use for a lasagna. If you’re doing this by yourself, take a sturdy spatula and place it underneath one side of the ham. Then use kitchen tongs on the other side to help lift it. Be careful because the ham and juices will be extremely hot. You can also use a second person to help if needed. Transfer the ham to your foil roasting pan, keeping the cut side down. Next, take a measuring cup and carefully scoop approximately 2 cups of the cooking juices from the crockpot. You’re only going to need 1 cup for the glaze, but I always like having extra just in case!

Preheat your oven to 450°F. In a bowl, combine 2 cups light brown sugar, 1 teaspoon cinnamon, ½ teaspoon ground nutmeg, and ½ teaspoon ground ginger. Mix everything together until the spices are evenly distributed throughout the brown sugar. Now divide that mixture roughly in half. We’re using half on the ham and the other half to make our incredible glaze.

Take approximately half of your brown sugar spice mixture and sprinkle it all over the ham. Since the ham is hot, I like using a spoon. Sprinkle the mixture across the top, down the sides, and gently lift the spiral slices so you can get some of that delicious brown sugar mixture between them. Now take your reserved pineapple rings and arrange them all over the ham. I like to drape them over the top and let them cascade down the sides. Scatter any remaining pineapple slices around the ham in the pan.

Place your ham into the preheated 450°F oven. Let it bake for approximately 5 minutes. This helps the first layer of brown sugar begin to melt and caramelize. And while that’s happening, we’re making our second glaze!

In a small saucepan, add 1 cup of the reserved crockpot cooking juices and the remaining half of your brown sugar spice mixture. Place the saucepan over medium heat and stir with a rubber spatula. Bring the mixture to a boil. Once it begins boiling, reduce the heat to medium-low. Allow the mixture to bubble gently and simmer, stirring occasionally, until it reduces by approximately half and becomes glossy and slightly thickened.

Carefully remove the ham from the oven. Pour your warm brown sugar glaze all over the ham. Use a pastry brush to spread the glaze across the top, down the sides, and between the spiral slices. Make sure you get that delicious glaze everywhere! This is what creates the DOUBLE brown sugar glaze.

Return your glazed ham to the 450°F oven for approximately 5–7 minutes. Then, if you’d like a deeper caramelized finish, switch your oven to BROIL for another minute or two, watching it constantly. Do not walk away from your oven! The brown sugar can go from perfectly caramelized to burnt very quickly. You’re looking for a beautiful, glossy, golden-brown finish. Once your ham has the color you want, remove it from the oven. If using a disposable foil pan, support it underneath with a sturdy baking sheet before moving it, and make sure the pan is safe for the broiler. Otherwise, transfer the ham to a broiler-safe roasting pan for the final step.

Allow your ham to rest briefly before serving. Then spoon some of that incredible glaze over the slices. And THAT’S IT! You just made the most delicious, juicy, caramelized Honey Baked Ham right in your crockpot, with just a short oven finish!