Beat the first five ingredients with an electric mixer on medium speed until completely blended and then slowly add the flour and beat on low speed until completely blended.
Roll the dough into a ball and knead slightly on a lightly floured surface, roll into a 6 inch log, wrap in plastic wrap and refrigerate until completely firm, about 2 hours.
Preheat the oven to 350 degrees F.
Remove plastic wrap, slice the log width-wise 1/4 inch thick, arrange slices at least 1/2 inch apart on a baking sheet, sprinkle lightly with salt if desired and bake the crackers until lightly browned on the edges, about 20 minutes. Let cool before serving.
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Yummy. Mix cheese, butter, salt, and pepper. Work enough flour in by hand to form a stiff dough. If it gets too dry add a few drops of cold water. Shape the dough into small balls.