In a large mixing bowl beat 2 stick butter until creamy and light in color. Add in shredded cheddar cheese and mix until well combined.
In a medium bowl sift together flour, salt, and baking powder. Add ceyenne, paprika, or chili powder, if desired.
Add 1/3 of the flour mixture into the butter mixture and mix with a wooden spoon. Mix in another 1/3 of the flour mixture. Mix in the rest of the flour mixture into the batter with the parsley flakes.
Mix with your hands until a dough ball forms.NOTE: the whole process of the recipe can be done in a stand mixer with a paddle attachment. Place dough onto a non-stick surface (a silpat mat works really well) and roll out with a piece of parchment on top of dough to prevent stickage. Roll out to a rectangle shape.
Cut rectangle dough in half lengthwise and cut into strips about 1/4-1/2 inch wide. Prick the strips with a fork or scrape the fork along the strips for texture. You can even give the strips shape by curving them into S shapes.
Place the strips onto a parchment lined sheet pan with a little space in between.
Place in 350 degree preheated oven for 14-16 minutes or until golden brown and cooked through. (Depending on the thickness, may need more time.)
Remove from sheet pan immediately onto a wire wrack and allow to cool completely to form and hold shape. Serve in wide glasses or on a platter.