Cowboy Cornbread

Ingredients

• 1 cup all-purpose flour
• 1 cup cornmeal
• 1/3 cup brown sugar
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon kosher salt
• 1 1/2 cups cheddar cheese, shredded
• 2 jalapeños, seeded and diced
• 1/2 stick unsalted butter
• 1 1/3 cups buttermilk, shaken
• 3 large eggs, room temperature
• 1/2 cup neutral-flavored oil
• 1 teaspoon olive oil
• 2 scallions, ends trimmed, thinly sliced
• kosher salt, to taste
• 1 stick unsalted butter, softened
• 1/4 teaspoon flaky sea salt, for topping