Matcha Cookies:
1 cup (226g) unsalted butter, softened
3/4 cup (150g) granulated sugar, plus more for coating
3/4 cup packed (150g) light brown sugar
2 tablespoons (16g) matcha powder (see note 3)
2 large eggs, room temperature
3 cups (360g) all purpose flour
1 teaspoon baking soda
1/2 teaspoon cream of tartar
1/2 teaspoon kosher salt
granulated sugar, for rolling
roasted black sesame seeds, whole for topping
[Filling Option 1] Red Bean:
1/2 cup (165g) red bean paste
4 1/2 tablespoons (63g) unsalted butter, softened
2 1/2 tablespoons (6g) all purpose flour
1/8 teaspoons kosher salt
[Filling Option 2] Black Sesame:
2/3 cup (75g) roasted black sesame seeds, ground to coarse powder
7 tablespoons (98g) unsalted butter, softened
7 tablespoons (89g) granulated sugar
3 teaspoons (8g) all purpose flour
DIRECTIONS
Make cookie dough. In the bowl of a stand mixer fitted with a paddle attachment, cream together softened butter, sugars, and matcha until smooth, about 3 minutes. Add egg and mix until incorporated. Scrape down bowl as needed to ensure thorough mixing.
In a medium bowl, whisk together flour, baking soda, cream of tartar, and salt. Add dry mixture to mixing bowl. Mix on low speed until dough forms. Scrape down bowl as needed. Do not overmix.
Cover and refrigerate dough for at least 1 hour, overnight is best.
Make filling. In a small bowl, mix ingredients of chosen filling thoroughly. Cover and refrigerate for at least 1 hour or until firm enough to easily scoop into a ball.
Form cookies. Once cookie dough and filling are sufficiently chilled, preheat oven to 350F with rack in middle of oven. To form each cookie, use large ice cream scoop to scoop out matcha cookie dough (see note 2). Split in half and roll each half into a ball. Place each ball on a parchment lined cookie sheet and flatten slightly with your palm. Use small ice cream scoop to scoop out filling. Place in center of one of the flattened dough halves. Top with the other flattened dough half and re-roll into a ball. Roll in sugar. For black sesame stuffed cookies, dip top of cookie in black sesame seeds and slightly press into dough to stick. Repeat until all dough and filling has been used. If at any point during assembly, the cookie dough or fillings become too warm and difficult to work with, pop them back in the fridge for at least 30 minutes (or freezer for 10 minutes) to firm up before making more.
Bake cookies. Space cookies 3" apart on cookie sheet as they will spread while baking (I fit 6 cookies on a sheet). Bake in batches in preheated oven for 18-20 minutes, or until they just begin to brown at the edges. Cool completely on cookie sheet to firm up before eating.