1-First Step: Get the smoker ready. Preheat your smoker to 225°F and use hickory or oak for the best flavor. These woods give the Smoked Meatloaf that classic backyard barbecue taste without overpowering the meat. While the smoker heats up, gather all your ingredients so the mixing part stays quick and easy. If you are cooking for a family with different tastes, this is a good time to set out extra toppings or side dishes. The loaf itself is already bold, but sides can help balance the heat from the pepper jack and red pepper flakes.

2-Second Step: Mix the meatloaf base gently. Add the ground beef, panko bread crumbs, grated red onion, minced garlic, eggs, Worcestershire sauce, 2 tablespoons whiskey, seasoning, and milk to a large bowl. Mix just until combined. The key here is to be gentle. Overmixing can make smoked meatloaf tough, and nobody wants a dry slice that fights back. For best results, use clean hands or a large spoon and stop as soon as the mixture looks evenly blended. If you are using a leaner beef blend, the milk and eggs help keep the texture moist and tender.

3-Third Step: Shape and stuff the loaf. Divide the meat mixture in half. Press the first half into a loaf shape inside a grill basket. If your basket has holes, that is even better because it lets the smoke move around the meat. Next, lay the pepper jack cheese over the center, keeping it away from the edges so it stays inside while cooking. Top with the remaining meat mixture and seal the edges carefully. This step matters a lot. A tight seal helps keep the cheese from leaking out and keeps the loaf looking neat when it comes off the smoker.

4-Fourth Step: Make the sauce. In a small bowl, mix the ketchup, brown sugar, 1/4 cup whiskey, and crushed red pepper flakes. Stir until the sugar starts to blend into the ketchup. The sauce should look glossy, thick, and a little spicy. It gives the smoked meatloaf a sticky top layer that caramelizes beautifully while it cooks. If you like a sweeter glaze, you can add a little more brown sugar. If you want more heat, add a pinch more red pepper flakes. Keep the balance in mind so the sauce complements the smoky beef instead of drowning it out.

5-Fifth Step: Smoke the loaf slowly. Spread the sauce over the top of the loaf, then place it in the smoker. Close the lid and let it cook for about 4 hours, or until the internal temperature reaches 165°F. A meat thermometer is your best friend here because it takes the guesswork out of doneness and keeps food safety simple. The long smoke time gives the meatloaf time to soak up flavor while staying tender inside. Resist the urge to open the smoker too often. Every peek lets heat escape and can slow the cooking process.

6-Final Step: Rest, slice, and serve. When the smoked meatloaf hits 165°F, remove it from the smoker and let it rest for 5 minutes. This short rest helps the juices settle so each slice stays moist. Then cut into thick slices and serve while the cheese is still soft and melty.