In a sauce pan or pot, melt the butter on low heat. To turn this into brown butter, allow the melted butter to begin to foam. Once it starts to foam, whisk or stir the liquid butter frequently. The butter will begin to smell nutty and very fragrant. Once the foam has subsided, the butter should have some brown, lightly toasted bits floating at the bottom. Pour the brown butter in a heat safe bowl to cool for about 10-15 minutes.
1 cup (226 g) unsalted butter
In a large bowl, whisk the flour, baking soda, salt and matcha powder together until well combined.
2 cups (240 g) all purpose flour, 1 teaspoon baking soda, ½ teaspoon salt, 1-2 tablespoon matcha powder
In another large bowl, whisk the warm brown butter, light brown sugar , granulated sugar and lemon zest until well combined. Whisk in the eggs and vanilla extract until well combined.
1 cup (200 g) light brown sugar, ¼ cup (50 g) granulated sugar, 1 lemon, zested, 2 large eggs (US), room temperature, 1 teaspoon (5 ml) vanilla extract
Mix the dry ingredients into the wet until just combined. Fold in the white chocolate chips.
1 cup (140 g) white chocolate chips
Scoop about 2 tablespoons (30 ml) of matcha cookie dough onto a small lined baking sheet or large plate. Place the cookie dough balls in the fridge to chill for 60 minutes.
Preheat the oven to 350 F (177 C). Line two large baking sheets with parchment paper. Place 5-6 balls of chilled matcha cookie dough on the baking sheet about 3 inches apart. Top with more white chocolate chips if you like.
Bake the chewy matcha cookies for 10-12 minutes. The edges will be set and lightly golden brown.
Remove the cookies from the oven onto a cooling rack or stove top. After 3 minutes, transfer the cookies off the hot baking sheet and onto the cooling rack to cool to room temperature and enjoy!