First of all, you will want your cannabutter to be extremely potent, since you will be using only 1 1/2 tbsp of it. Otherwise, the effect will be fairly weak. Now, mix the flour, salt, baking soda and margarine into a large mixing bowl. When this mixture looks like breadcrumbs you have it right. Next, on low heat on a stovetop, melt the cannabutter and milk together. Now, add the milk/butter mixture and sugar into the mixing bowl that has the other ingredients and steadily knead it together. Spread the dough onto a flat surface evenly, until it is about 1" thick. Next, either use a pastry cutter or a knife to cut the dough into desired shapes. Place in an oven preheated to 380 degrees fahrenheit for 25 minutes. Take out, let cool and medicate away!