01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, salt, and matcha powder. Set aside.
03 - In a large bowl, cream the vegan butter and sugar together using a hand mixer or stand mixer until fluffy, about 2 minutes.
04 - Add the plant milk and vanilla extract to the butter-sugar mixture and mix until combined.
05 - Gradually add the dry ingredients to the wet, mixing until a soft dough forms.
06 - Divide the dough in half. Place one half in a separate bowl.
07 - To one half, add the strawberry preserves and fold in gently. The dough should turn pink with visible swirls; do not overmix.
08 - Using a spoon, dollop alternating teaspoons of matcha dough and strawberry dough onto a piece of parchment. Gently press together and roll into a log about 2 inches in diameter.
09 - Wrap the log tightly in parchment and chill in the freezer for 20 minutes, until firm.
10 - Slice the chilled dough into 1/2-inch thick rounds and place 2 inches apart on the prepared baking sheets.
11 - Bake for 10–12 minutes, or until the edges are just set and the centers look slightly soft.
12 - Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.