Preheat your oven to the appropriate temperature for baking.
In a mixing bowl, combine the grated cheddar cheese and softened butter until well blended.
Add the flour, baking powder, and a pinch of salt to the cheese mixture, stirring until combined.
Chop the green onion finely and mix it into the dough.
Gradually add the ice-cold water, mixing until the dough comes together.
Roll out the dough on a floured surface to your desired thickness.
Cut the dough into your preferred shapes and place them on a baking sheet.
Bake in the preheated oven until the crackers are golden and crisp.
