I start by heating the pot over medium. I cook the diced bacon until it’s nice and crisp. Then I remove most of it, leaving just a tablespoon of bacon fat in the pot for flavor.
Into the reserved bacon fat I toss the jalapeños and onions. I cook them for about 3–5 minutes, until softened, then stir in garlic for just a minute — you want its fragrance, not burnt garlic.
I sprinkle in the flour, stirring constantly for about a minute so no raw flour remains. Then I gradually whisk in the chicken broth and milk until smooth and lump-free.
Once the liquid is smooth, I add the diced potatoes. I cover the pot and lower the heat to a gentle simmer. I cook until potatoes are tender — about 20–22 minutes.
I stir in creamed corn, sweet corn, salt, pepper, and red pepper flakes. Next, I carefully blend about half the chowder (or use an immersion blender) until smooth. Then I return it to the pot, stir in cream cheese and cheddar until melted, then mix in half the cooked bacon.
I ladle the chowder into bowls, sprinkle with remaining bacon bits and chopped chives, and serve hot while creamy and rich.