Lemon Curd with flour

So, I got a lot of cookbooks again, haha, for this month, I got about 15 more cookbooks (I count only the one that already arrived but more are on their way).[...]

2 1/8 cups all-purpose flour 1/4 cup granulated sugar 1 tablespoon baking powder 1/4 teaspoon salt 1/4 cup cold unsalted butter , cut into small pieces 7[...]

1/2 cup unsalted butter , at room temperature 1/4 cup sugar 2 tablespoons beaten eggs , plus extra if needed 1 teaspoon lemon juice , plus extra if needed 1[...]