Start by placing your thick-cut bacon pieces in a large Dutch oven or heavy-bottomed soup pot over medium-high heat. This is the foundation of your chowder's flavor. Let those bacon pieces cook undisturbed for the first couple of minutes, then stir occasionally. You're looking for deep golden-brown color and crispy texture—about 3 to 4 minutes total. This isn't just about taste; those dark, crispy bits are going to provide beautiful color contrast against the cream base. I always use a slotted spoon to transfer the finished bacon to a paper towel-lined plate, leaving about 2 tablespoons of the rendered fat in the pot. That fat is liquid gold for flavor.

Add your finely chopped onion and celery to that warm bacon fat. This is where the magic of flavor development begins. Stir these vegetables frequently, and you'll notice they'll start to soften and the onion will turn from opaque white to golden around the edges—about 3 to 4 minutes. Don't rush this step. These vegetables need time to caramelize slightly, which deepens their natural sweetness and creates a richer base for your chowder. The kitchen will smell absolutely wonderful at this point.

Once your onion is softened and starting to brown, add your minced garlic, salt, dried thyme, and pepper. Stir constantly for just 1 minute. This brief cooking time allows the garlic to release its oils and bloom the thyme without burning the garlic—burned garlic tastes bitter and will affect the final flavor. You'll notice the aroma changes immediately, becoming more complex and savory.

Pour in your low-sodium chicken broth. Here's a professional tip I always share: take a wooden spoon and gently scrape the bottom of the pot, loosening all those browned, flavorful bits stuck to the bottom—what we call the fond. These bits contain concentrated flavor, and they'll dissolve into your broth, making it richer and deeper. This takes just a minute or two, but it's crucial for a complex-tasting final dish.

Add your chopped red potatoes and corn to the broth. Bring everything to a gentle simmer—you want small, steady bubbles, not a rolling boil. Reduce the heat to medium-low, cover the pot with a lid, and let it simmer for 12 to 15 minutes. The potatoes should become tender enough to easily pierce with a fork, but not so soft they fall apart. The red potato skins will remain visible, creating those beautiful color flecks throughout your chowder. This is exactly what you want.

In a small bowl, whisk together your cornstarch and whole milk until completely smooth with no lumps. This is important—lumps will create a grainy texture, and nobody wants that. Now, here's the technique: remove your pot from direct heat and slowly drizzle this mixture into the simmering chowder while stirring constantly. Add it gradually, stirring gently to incorporate it fully. This method ensures you get a smooth, silky texture rather than a gluey mess. You should see the broth thicken noticeably and take on a velvety appearance—usually within 2 to 3 minutes of stirring.

Taste your chowder before serving. Does it need a pinch more salt? A crack of pepper? This is your moment to adjust. Add back your crispy bacon pieces, then ladle the chowder into warm bowls. The heat of the soup will help melt any cheese you add on top, and the warmth keeps everything looking appetizing and inviting.