1. Preheat oven to 350°F. Line a 9” square pan with parchment.
2. Soak cake strips in ice water.
3. Mix flour, sugar, matcha, baking powder, and salt.
4. Cut butter into cubes and blend until sandy.
5. Add oil, milk, vanilla. Mix until combined.
6. Whip egg whites to medium peaks, fold in gently.
7. Pour batter into pan. Wrap cake strips around pan.
8. Bake 35 minutes or until toothpick comes out clean.
9. Cool completely on a rack.
10. Beat mascarpone and sugar until smooth.
11. Add cream, whip until thick.
12. Frost cooled cake, dust with matcha. Slice and serve.