Sauté the veggies: Melt 2 tablespoons butter in a large pot over medium heat. Add the mirepoix and season with salt & pepper (I add 1 tsp salt & 1/4 tsp pepper). Sauté for 7–9 minutes, stirring occasionally, until softened. Add the garlic and cook for another 30 seconds.
Add potatoes: Add the diced potatoes, thyme, paprika, and ground mustard. Sauté, stirring constantly, for 2 minutes over medium heat.
Simmer: Pour in the chicken stock and increase the heat to high. Bring to a boil, then reduce the heat to low. Cover and simmer for 15 minutes, stirring occasionally and replacing the lid promptly. The potatoes should be tender and easily pierced with a fork, but not soft or mushy.
Add corn: Remove the lid and stir in the frozen corn. Cook until the corn is heated through, about 2-3 minutes.
Make the creamy base: In a separate medium pot, melt the remaining 5 tablespoons butter over medium heat. Add the flour and cook, whisking constantly, for 1–2 minutes. While whisking briskly, gradually pour in the milk. Continue whisking until smooth. Season with a tiny pinch of salt & pepper, then cook, whisking very frequently, until nicely thickened (you’ll know it’s ready when you run your finger across the back of a wooden spoon and the line stays clean).
Finish the chowder: Stir the milk mixture into the soup over low heat. Cook, stirring often, until the chowder is nicely thickened. Increase the heat slightly if needed, but don’t let it boil. Once nicely thickened, turn off the heat and add the Cheddar one handful at a time, stirring gently between each addition until completely melted. Taste and adjust the salt & pepper as needed. The flavors should really sing!
Serve: Ladle into bowls and garnish with bacon if desired. Serve with hearty buttered bread or rolls. Enjoy!
Video
Notes
Note 1: You can make your own mirepoix by finely dicing 1 cup yellow onion, 1 cup celery & 1 cup carrots. This is approximately 1 small onion, 3 celery stalks & 3 carrots.Note 2: No need to thaw the corn first. For a smokier flavor, use fire-roasted corn.Note 3: If you’d like to add bacon to this chowder, finely dice 5–6 strips and cook them in the pot first. Remove the bacon with a slotted spoon, leaving 2 tbsp rendered fat behind. Use the bacon fat in place of the 2 tablespoons butter to sauté the veggies, then use the cooked bacon to garnish the finished bowls.Storage: Refrigerate leftover chowder for 3–4 days. Reheat gently over medium-low heat, stirring frequently, and avoid bringing it to a boil. If needed, thin with a splash of chicken stock or milk until it reaches your preferred consistency.