Fiona's Green Tea Cupcake

1 cup (2 sticks) unsalted butter, room temperature
1 1/2 cups sugar
2 large eggs
2 large egg yolks
3 cups all-purpose flour
2 tsp baking powder
1/8 tsp salt
1 cup milk
3 tbsp green tea powder

1. Cover sheet pan with parchment, rubbing butter and dusting with flour.
2. Beat butter on high until soft, about 30 seconds.
3. Add sugar. Beat on medium-high until light and fluffy.
4. Add eggs one at a time, beat until the eggs are incorporated and evenly mixed.
5. Whisk together flour, baking powder, and salt in a bowl. Add into batter and mix to combine.
6. Mix green tea powder in with the milk. Add to the batter and mix until combine.
7. Pour into prepared sheet pan(1 inch thick) and smooth flat. *Do not filled the pan full as the mixture will rise and flow out of the pan.
8. Bake for 20-22 minutes @ 180'C. It is done when a cake tester comes out clean

Note: You can use this batter and pour into cupcakes molds. Simply scoop into cupcake papers and bake for about the same amount of time.