INGREDIENTS :
Cookies:
1/4 cup semisweet chocolate chips (such as Ghiradelli® 60% Cacao)
1 1/8 cups all-purpose flour
3 tablespoons unsweetened baking cocoa (such as Ghirardelli®)
1 teaspoon baking powder
1 teaspoon ground cinnamon (optional)
1/4 teaspoon baking soda
1/2 teaspoon salt
1/2 cup unsalted butter, softened
1/3 cup white sugar
1 large egg, room temperature
1 1/2 teaspoons vanilla extract
1/4 cup buttermilk, at room temperature
Chocolate Frosting:
5 tablespoons unsalted butter
5 tablespoons heavy cream
3 tablespoons unsweetened baking cocoa (such as Ghirardelli®)
1 teaspoon vanilla extract
1/4 teaspoon salt
2 cups powdered sugar
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