In a food processor blend the softened butter with shredded cheese, egg yolk, black pepper and garlic powder (if using) process until smooth; add in flour, dried mustard powder, and salt; process until just combined.
Place the dough onto a clean work surface.
Divide into three potions.
Transfer each section to wax paper and shape each section into about 7-inch logs, about 1-1/2 inch thick.
Chill the logs until very firm (about 3 hours).
At this point you can place the logs on flat sheet and freeze until firm, wrap in plastic wrap then tightly in foil and freeze up to 3 months.
Set oven to 350 degrees (rack set to middle position).
Line a baking sheet with parchment paper.Slice the cold dough into about 1/8-inch thick.
Arrange each slice on baking sheet 1-inch apart.
Sprinkle very lightly with kosher salt if desired.
Bake for 10-12 minutes.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	1077.5 Kcal (4511 kJ)
Calories from fat	721.09 Kcal
		% Daily Value*
Total Fat	80.12g	123%
Cholesterol	262.39mg	87%
Sodium	1867.85mg	78%
Potassium	286.6mg	6%
Total Carbs	53.24g	18%
Sugars	1.24g	5%
Dietary Fiber	6.27g	25%
Protein	37.64g	75%
Vitamin C	0.1mg	0%
Vitamin A	0.4mg	13%
Iron	4.9mg	27%
Calcium	995.5mg	100%

Amount Per 100 g
Calories	425.58 Kcal (1782 kJ)
Calories from fat	284.81 Kcal
		% Daily Value*
Total Fat	31.65g	123%
Cholesterol	103.63mg	87%
Sodium	737.74mg	78%
Potassium	113.2mg	6%
Total Carbs	21.03g	18%
Sugars	0.49g	5%
Dietary Fiber	2.48g	25%
Protein	14.87g	75%
Vitamin A	0.2mg	13%
Iron	2mg	27%
Calcium	393.2mg	100%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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