Preheat oven to 400 F. In a large bowl, whisk together flour, salt, and baking powder. Add in diced jalapeno, cheese, and cubed butter. Cut the ingredients in with a pastry blender until crumbly.
Pour in milk, mix until a dough forms. Turn dough out onto a floured surface. Pat into a large rectangle. Cut out biscuits with a round biscuit cutter. Place onto a large greased baking sheet. Bake for 15-20 minutes.