Amaretto Gateau

Ingredients:

For the cake:

1 1/2 cups all-purpose flour
1/2 teaspoon baking powder
1/4 teaspoon baking soda
1/8 teaspoon salt
1 1/2 cups white sugar
1/2 cup (1 stick) unsalted butter, softened
2 large eggs
1 teaspoon vanilla extract
1 cup milk
1/2 cup Amaretto liqueur
For the frosting:

1 cup (2 sticks) unsalted butter, softened
3 cups confectioners’ sugar
1/4 cup Amaretto liqueur