MATCHA CAKE
CINNAMON FILLING
MATCHA CRUMBLE
Position a rack in the center of the oven and preheat it to 350F. Line the bottom and sides of an 8 by 8-inch baking pan with parchment paper.
Make the cake: In a stand mixer fitted with the paddle attachment, beat together the sugar and butter at medium-high speed until light and fluffy, 3 to 4 minutes.
In a small bowl, whisk together the eggs and créme fraiche. Pour this into the butter mixture. Mix on medium speed to combine, scraping down the sides as needed.
In a large bowl, whisk together the flour, baking powder, matcha, and 1 teaspoon salt. Add this to the wet ingredients and mix on the lowest setting to combine.
Make the filling: In a small bowl, whisk together both sugars, the flour, and cinnamon.
Pour two-thirds (400g) of the batter into the lined baking pan. Spread the batter to the edges (it'll be thick!) and sprinkle the cinnamon filling evenly over the top. Dot the rest of the batter on top of the cinnamon filling, then spread it out so that it evenly covers the filling layer.
Make the crumble: In a medium bowl, whisk together the flour, granulated sugar, and matcha. Cube in the butter and use your fingers to toss the butter pieces to coat in the flour, then pinch and flatten them into pieces no bigger than a bean, creating a chunky, gravelly texture. Scatter the crumble evenly over the batter, reaching all the way to the edges. Bake until a toothpick inserted comes out clean, 40 to 45 minutes.
Let cool to room temperature before slicing; otherwise, you risk losing some of the crumble and that clean-cut look.