In a large bowl, combine the bread flour, 2 cups (240 g) of the all-purpose flour, yeast, and salt.
2 cups (240 g) bread flour, 1 tablespoon instant yeast, 1 ½ teaspoons salt
Add the cubed cheddar cheese and diced jalapeños. Toss until the cheese and jalapeños are coated with flour.
2 cups (226 g) sharp cheddar cheese, ½ cup fresh jalapeños
Pour in the warm water and stir until a shaggy dough forms. Add more all-purpose flour if the dough is too wet. If there is residual flour in the bottom of the bowl, add additional water 1 tablespoon at a time until all the flour is incorporated.
1 ½ cups (340 ml) water
Leave the dough in the bowl, and knead it 4 or 5 times until it smooths out a bit. If any cubes of cheese fall out, add them back to the dough.
Drizzle the oil over the dough and turn it to coat. Cover with plastic wrap or a clean towel and let it rise in a warm, draft-free area until doubled in size.
1 tablespoon olive oil
While the dough rises, place a large Dutch oven and its lid in the oven and preheat to 450°F.
Transfer the risen dough to a piece of parchment paper. Shape it into a tight ball and place it on the parchment paper.
Carefully place the parchment paper and dough into the hot Dutch oven and cover with the hot lid.
Reduce the oven temperature to 400°F and bake for 40 minutes. Remove the lid and bake for an additional 15 to 20 minutes until the bread is golden brown.
Remove the bread from the oven and transfer to a wire rack to cool completely before slicing.