Heat the oven to 170 degrees. Stir the self-raising flour, oat flour, stevia, coconut sugar, gingerbread spices, cinnamon, baking powder and a pinch of salt together in a bowl.
Add the cold margarine, vanilla extract, and milk and knead into a firm ball. Do not knead too long, because the dough should not get too hot.
Roll the dough into a thin layer. Place a gingerbread man mold several times in the dough to create the cookies. Line a baking tray with a piece of baking paper. Place the cookies on the baking tray. (the cookies will rise in the oven, don't make them too thick)
Put the gingerbread men in the oven for about 20-25 minutes. When they come out of the oven they will still feel a bit soft but when they have cooled down they will become crispy.
Make sure to decorate them!! :)