Heat the olive oil in a large Dutch oven or heavy-bottomed pot over medium heat. Add the onion and celery and cook, stirring occasionally, for 7-10 minutes, or until softened. Adjust the heat as needed to prevent the vegetables from browning.
3 tablespoons olive oil, 1 large white onion, 2 stalks celery
Stir in the jalapeño, garlic, paprika, Italian seasoning, salt, and black pepper. Cook for 30-60 seconds, or until fragrant. Sprinkle the flour over the vegetables and cook for 1-2 minutes, stirring continuously.
1 jalapeño, 3 cloves garlic, 1 teaspoon paprika, 1 teaspoon Italian seasoning, 1 teaspoon salt, 1 teaspoon black pepper, ⅓ cup all-purpose flour
Slowly pour in the chicken broth, stirring continuously so that the flour incorporates smoothly into the broth. Scrape up anything stuck to the bottom of the pot and bring to a gentle simmer.
6 cups low-sodium chicken broth
Add the chicken breasts, corn, and potatoes. Return to a gentle simmer, then partially cover and cook for 15-20 minutes, or until the potatoes are fork-tender and the thickest part of the chicken registers 165°F with an instant-read thermometer. If the chicken reaches 165°F before the potatoes are tender, remove it and allow the potatoes to continue cooking.
1 pound boneless, skinless chicken breasts, 2 (15-ounce) cans sweet corn, 3-4 medium Yukon Gold or red potatoes
Transfer the cooked chicken breasts to a clean plate or bowl. Let them rest for a few minutes, then shred into bite-size pieces using two forks. Set aside.
Use an immersion blender to partially blend the chowder directly in the pot. Blend just enough to break down some of the potatoes and corn and thicken the broth.
Reduce the heat to low and stir in the heavy cream. Gently warm the chowder, stirring occasionally. Do not bring it to a hard boil after adding the cream.
1 cup heavy cream
Stir the shredded chicken back into the chowder and cook just until warmed through. Taste and add additional salt and black pepper as needed. Serve warm with shredded cheddar, green onions, cilantro, sliced jalapeno, or your favorite toppings.