In a bowl or stand mixer, cream together butter and sugar. Beat until light and fluffy. Scrape bowl as needed. Mix in one egg at a time, followed by vanilla. Add salt and baking powder. Mix in one cup of flour at a time, increasing speed between additions. Mix until no streaks remain. Refrigerator dough for 1-2 hours or until dough is firm but manageable.
Add desired colors of sanding sugar to separate clean bowls.
Carefully remove wrappers from chocolate Kisses and set aside on a plate. This may be done in small batches.
Using a small cookie scoop, scoop heaping balls of dough. Shape into smooth 1-inch balls. Roll in sanding sugar. Space 2-inches apart on prepared baking sheet. Bake for 12 minutes. Immediately press an unwrapped chocolate Kiss into each cookie. Immediately transfer cookies to a wire rack to cool completely and allow chocolate to set.
Once chocolate has completely set, cookies may be stored in an airtight container.
Nutritional information is provided as a courtesy and is an estimate only. Nutrition information can vary for a variety of reasons. For the most accurate data, use your preferred nutrition calculator with the actual ingredients you used to make this recipe.
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