01 -
In a large bowl, sift together the all-purpose flour, cornmeal, sugar, baking powder, and salt.
02 -
In a separate bowl, whisk together buttermilk, eggs, and melted butter until fully combined.
03 -
Make a well in the center of the dry mixture and pour in the wet ingredients; stir just until combined. Do not overmix.
04 -
Fold in 170 g grated cheddar, chopped scallions, and minced jalapeños until evenly distributed; allow the mixture to rest at room temperature for 20 minutes.
05 -
Preheat oven to 175°C. Grease a 23 x 33 x 5 cm baking dish with butter.
06 -
Spread batter evenly into the prepared dish and sprinkle the surface with reserved cheddar and extra scallions.
07 -
Bake for 30–35 minutes or until a toothpick inserted in the center emerges clean.
08 -
Allow to cool slightly, then cut into squares and serve warm.