Preheat oven to 350°F. Spray an 8"x8" baking pan with cooking spray.
In a large bowl, whisk together milk, butter and egg. Stir in masarepa, flour, sugar, baking powder, Adobo, jalapeños and cheese until all ingredients are well combined.
Pour into prepared pan and bake 25 minutes until golden or toothpick inserted comes out clean. Remove from oven, let cool and slice into 12 pieces.