1-First Step: Prep the smoker and ingredients Start by preheating your smoker to 225°F. Hickory or oak wood works best here because both give the meatloaf a deep, savory smoke flavor without overpowering the pepper jack and whiskey glaze. While the smoker heats, finely chop the red onion, mince the garlic, and measure everything else so the mixing process is quick and smooth. Set out a grill basket or perforated rack if you have one. This setup helps smoke move around the meatloaf from all sides. That airflow is a big reason this turns out well as a traeger meatloaf or any other pellet grill version.

2-Second Step: Mix the meatloaf gently In a large bowl, combine the ground beef, panko bread crumbs, chopped red onion, minced garlic, eggs, Worcestershire sauce, 2 tablespoons whiskey, beef seasoning, and milk. Mix everything gently by hand until it is just combined. Do not overwork the meat. If you press and squeeze too much, the loaf can turn dense instead of tender. For the best texture, stop mixing as soon as the ingredients come together. A light hand makes a big difference here. This is one of the most important tips for any smoked meatloaf recipe. The mixture should hold together, but it should not look packed or sticky.

3-Third Step: Shape and fill the loaf Take about half of the meat mixture and form it into a loaf shape in your grill basket or on your perforated rack. Make a shallow trench down the center, or shape the loaf into a base layer with a small well in the middle. Place the pepper jack cheese in the center, using cubes or slices, then cover it with the remaining meat mixture. Seal the edges very well so the cheese stays inside while it smokes. This step gives the finished loaf its cheesy core. If you want a more dramatic slice, keep the cheese centered and tucked in tight. A secure seal is the best way to keep leaks down during cooking.

4-Fourth Step: Make the sauce and brush it on In a small bowl, mix the ketchup, brown sugar, 1/4 cup whiskey, and crushed red pepper flakes until smooth. The sauce should be thick, shiny, and a little spicy. Brush it evenly over the top of the loaf so every bite gets that sweet heat. Apply the sauce in a thin, even coat. If you like a thicker glaze, you can brush on a second layer during the last hour of smoking. That gives the top a deeper color and a stickier finish.

5-Fifth Step: Smoke until done Place the meatloaf in the smoker and cook it for about 4 hours, or until the internal temperature reaches 165°F. Use a thermometer for food safety. This is the best way to know your loaf is done without guessing. The exact cooking time can vary a little depending on the thickness of the loaf and the accuracy of your smoker. If you are making a smoked meatloaf temperature check part of your routine, aim for the thickest center of the loaf. Do not rely on color alone. Smoked beef can look done before it really is.

6-Final Step: Rest, slice, and serve Once the meatloaf hits 165°F, remove it from the smoker and let it rest for at least 5 minutes. That short rest helps the juices settle and makes slicing easier. After resting, cut into thick slices so the pepper jack center shows in the middle. Serve it with mashed potatoes, roasted vegetables, cornbread, or a simple salad. This recipe feeds about 6 people, so it works well for family dinner or casual weekend guests.