375* oven.
Place biodegradable parchment paper on large baking sheet. Set aside.
Combine all the ingredients EXCEPT for brown sugar in a large mixing bowl.
Whisk to remove lumps.
Add brown sugar, shortening, egg, and the buttermilk then BEAT with an electric mixer or handheld immersion blender for a minute until smooth.
Stir in raisins, if using.
Using a Tablespoon and a half measuring scoop or two large spoons, drop batter onto the parchment-covered baking sheet. Leave room for expansion, so expect to make two batches.
Sprinkle with coarse sugar.
Bake 12-15 minutes or until golden brown. The tops will spring back if you lightly press them, the bottoms will have a golden brown color, and the breakfast cookies will look like something you want to eat. They will have lost that glossy look.
Let cool briefly, then glaze if desired. Serve warm.