Preheat oven to 325 degrees. Sift flour, cocoa powder, baking soda, baking powder, and salt into a bowl. Beat butter and sugar with a mixer on medium-high speed for 1 minute. Reduce speed to medium-low, and add egg, then yolk, beating well after each addition. Beat in peppermint extract. Slowly add flour mixture, and beat until just incorporated. Shape dough into 2 disks, wrap each in plastic, and refrigerate until firm, at least 1 hour (or up to 2 days).
Roll out 1 disk of dough on a lightly floured surface to 1/8-inch thickness. Freeze until firm, about 15 minutes. Using a 2-inch round cutter, cut out circles, and place 1 inch apart on parchment-lined baking sheets. Roll and cut scraps once. Freeze cookies until firm, about 15 minutes. Repeat with remaining disk.
Bake until cookies are dry to the touch, about 12 minutes. Transfer parchment, with cookies, to wire racks, and let cool. (Undecorated cookies will keep, covered, for up to 3 days.)
Sift crushed candy, and separate larger pieces from dust, reserving both. Melt chocolate in a heatproof bowl set over a pot of gently simmering water. Remove from heat. Dunk cookies into melted chocolate. Using a fork, turn to coat, let excess drip off, and gently scrape bottom against edge of bowl. Place on parchment-lined baking sheets, and sprinkle 1/4 teaspoon of either candy pieces or dust on top. Repeat, sprinkling half the cookies with pieces and the rest with dust. Refrigerate until set, up to 3 hours. Decorated cookies are best served the same day.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	545 Kcal (2282 kJ)
Calories from fat	273.69 Kcal
		% Daily Value*
Total Fat	30.41g	47%
Cholesterol	59.57mg	20%
Sodium	231.9mg	10%
Potassium	316.15mg	7%
Total Carbs	64.23g	21%
Sugars	53.28g	213%
Dietary Fiber	1.5g	6%
Protein	7.44g	15%
Vitamin C	0.8mg	1%
Vitamin A	0.1mg	2%
Iron	0.8mg	4%
Calcium	171.9mg	17%

Amount Per 100 g
Calories	478.19 Kcal (2002 kJ)
Calories from fat	240.14 Kcal
		% Daily Value*
Total Fat	26.68g	47%
Cholesterol	52.27mg	20%
Sodium	203.47mg	10%
Potassium	277.39mg	7%
Total Carbs	56.36g	21%
Sugars	46.74g	213%
Dietary Fiber	1.32g	6%
Protein	6.52g	15%
Vitamin C	0.7mg	1%
Vitamin A	0.1mg	2%
Iron	0.7mg	4%
Calcium	150.8mg	17%

* 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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