Sweet, savory, and finished with a sticky glaze, slow cooker cola ham makes a generous centerpiece for Sunday dinner or a holiday table. Cola adds caramel flavor to the cooking liquid, while mustard and a little vinegar balance the sweetness. A short oven finish gives the ham its glossy, browned crust.
The slow cooker handles the gentle heating, leaving the oven free for most of the afternoon. Serve the ham thickly sliced with mashed potatoes and green beans, then save the extra slices for sandwiches.
Recipe at a glance
- Servings: 10–12
- Prep: 15 minutes
- Slow cooker: approximately 4–5 hours, depending on your appliance and ham
- Glazing and resting: 25–30 minutes
- Equipment: 6–7-quart oval slow cooker, thermometer, saucepan, pastry brush, and rimmed roasting tray
Why cola works in this recipe
Regular cola contributes sweetness and caramel notes that complement salty cured ham. The liquid keeps the cooking environment moist, but it does not create a roasted crust inside the covered cooker. That comes from reducing a portion of the liquid with brown sugar and mustard, brushing it over the ham, and finishing in a hot oven.
Choose the right ham
Use a 4-pound fully cooked, ready-to-eat, boneless, unsliced ham that fits comfortably under the lid. A ham with a thin fat cap works well for scoring and glazing. This recipe is not for raw pork, uncooked gammon, or dry-cured country ham; those need different preparation and cooking instructions.
Check both the ham label and your slow cooker’s instructions before starting. Use this method only if the manufacturer permits heating commercially packaged fully cooked ham in the appliance; follow its directions if they differ. USDA advises against reheating cold cooked foods or leftovers in a slow cooker. If your appliance does not provide a suitable method, heat the ham covered in a 325°F oven according to its package directions, then use the glaze below.
Ingredients
For the ham
- 1 fully cooked boneless ham, about 4 pounds (1.8 kg), thawed if previously frozen
- 1 can (12 fluid ounces / 355 ml) regular cola
For the glaze
- 1 cup (240 ml) liquid from the slow cooker
- 1/2 cup (100 g) packed light brown sugar
- 2 tablespoons Dijon mustard
- 1 tablespoon apple cider vinegar
- 1/4 teaspoon ground cloves, optional
Ingredient notes: Choose regular cola for the intended sweetness; diet cola will not give the same flavor or reduction. No added salt is usually needed because ham is already salty. For a gentler mustard flavor, use whole-grain mustard. Ground cloves are strong, so keep the amount small.
How to make slow cooker cola ham
Step 1: Prepare the ham
Remove all packaging, including any plastic cap or netting that the label instructs you to remove. Pat the ham dry. If there is a fat cap, score it shallowly in a diamond pattern without cutting deeply into the meat. Place the ham flat-side down in the slow cooker and check that the lid closes fully.
Step 2: Add the cola
Pour the cola around the ham. One can is enough for this size of ham; it should sit in liquid rather than be submerged. Do not add the glaze ingredients yet. Keeping the glaze separate gives you better control over its thickness and sweetness.
Step 3: Heat gently until ready
Cover and use the appliance manufacturer’s approved setting and timing for fully cooked ham. For appliances that allow this method, approximately 4–5 hours on LOW is a planning estimate, not a doneness test. Keep the lid closed as much as possible and check the thickest part with a food thermometer near the end.
For fully cooked ham packaged in a USDA-inspected plant, heat to 140°F (60°C), or the higher temperature specified on the package. Other precooked or repackaged ham needs 165°F (74°C). Stop heating once the appropriate temperature is reached so the meat stays juicy. Never use the WARM setting to heat cold ham.
Step 4: Make the brown sugar Dijon glaze
Heat the oven to 425°F (220°C). Carefully transfer the ham to a foil-lined rimmed roasting tray using two sturdy utensils. Measure 1 cup of cooking liquid into a saucepan. Add the brown sugar, Dijon, vinegar, and optional cloves. Bring to a boil, then simmer for 10–15 minutes, stirring occasionally, until syrupy enough to coat a spoon. It will thicken further as it cools. If the cooking liquid tastes very salty, replace half with water before reducing.
Step 5: Glaze and brown
Brush the ham with a generous layer of glaze. Bake for 10–15 minutes, brushing once more halfway through, until glossy and caramelized. Watch closely because the sugar can burn quickly. If using the broiler for extra color, broil only briefly under constant supervision. Reserve some glaze separately for serving.
Step 6: Rest, slice, and serve
Let the ham rest for 10–15 minutes, loosely tented with foil. Slice across the grain and arrange on a warm platter. Spoon over a little reserved glaze and serve the rest alongside. The finished ham should have moist pink slices and a shiny brown exterior.
Tips for a juicy ham and sticky glaze
- Choose a ham that fits. The lid must close properly. Use a smaller ham if necessary.
- Thaw in the refrigerator. Start with fully thawed ham and keep it chilled until preparation.
- Use temperature as your guide. Ham shape, starting temperature, and slow cooker performance change the timing.
- Reduce the glaze separately. Brushing thin cooking liquid over the meat will not give the same sticky coating.
- Keep the oven finish short. Its purpose is to brown the glaze after the ham is heated through.
- Adjust the sauce at the end. Add a splash of vinegar for more tang, or a little water if it becomes too thick.
What to serve with cola ham
Buttery mashed potatoes or scalloped potatoes pair well with the sweet glaze. Add green beans, roasted carrots, cabbage, or a crisp apple slaw for balance. Dinner rolls are useful for catching the sauce, and a sharp mustard on the table gives guests a less sweet option.
For a holiday meal, prepare the vegetables while the slow cooker runs, then roast them before the ham’s final glazing stage. Keep the serving platter warm so sliced ham stays pleasant at the table.
Variations
Orange cola ham: Replace 2 tablespoons of the cooking liquid in the glaze with orange juice and add a little finely grated orange zest.
Spicy glaze: Stir a pinch of cayenne or a small spoonful of chili sauce into the glaze. Taste before adding more.
Whole-grain mustard glaze: Replace Dijon with the same amount of whole-grain mustard for a textured finish.
Spiral-sliced ham: It can dry out more quickly. Follow its package and appliance directions, check temperature early, and handle carefully when transferring.
Storage and reheating
Refrigerate leftover ham in shallow covered containers within 2 hours of serving, or within 1 hour if the temperature is above 90°F (32°C). Keep the refrigerator at 40°F (4°C) or below and use sliced leftover ham within 3–4 days. For longer storage, freeze portions with a little sauce for up to 1–2 months for best quality.
Reheat leftovers covered in a 325°F oven, in a saucepan with a splash of water, or in the microwave until they reach 165°F (74°C). Reheat sauce to a boil. Do not use a slow cooker to reheat cold leftovers. Leftover ham is excellent in sandwiches, omelets, fried rice, and pea soup.
Frequently asked questions
Can I use diet cola?
Regular cola is recommended for its flavor and sugar content. Diet cola changes the taste and does not contribute the same body to the reduced glaze.
Does the cola make the ham taste like soda?
It adds a mild caramel sweetness. Mustard, vinegar, and the savory ham keep the finished dish balanced.
Can I use raw gammon instead?
Not with these instructions. Raw gammon needs a recipe designed for uncooked meat, including its own cooking time and safe temperature guidance.
Do I have to finish it in the oven?
The oven finish is what gives this recipe its browned, sticky crust. You can serve appropriately heated ham with the reduced glaze poured over it, but the surface will remain softer and lighter.
Why is my glaze thin?
It needs more reduction. Simmer uncovered until it coats a spoon, remembering that it thickens as it cools. If it gets too thick, whisk in water a teaspoon at a time.
Can I prepare it ahead?
Measure the glaze ingredients ahead and keep them covered. For the best texture, heat and glaze the ham on the day of serving. If preparing the whole dish ahead, chill promptly and reheat in the oven to 165°F before serving.
Food safety references
Temperature and reheating guidance: FoodSafety.gov minimum internal temperatures and USDA safe reheating methods. Storage guidance: FDA food storage chart.