Oatcake

Instructions

1. Preheat the oven to 180 °C (gas mark 4).
2. Mix the oatmeal, flour, salt and baking soda in a bowl.
3. Rub in the cold butter with your fingertips until the texture is sandy.
4. Gradually add the lukewarm water to form a firm dough that doesn't stick.
5. Roll it out very thinly on a floured surface and cut out rounds or squares.
6. Arrange on a tray and bake for 15 to 18 minutes, until the edges are golden and crispy.
7. Let them cool completely on a wire rack so they become crunchy.