Whisk together the flour blend with the baking powder and salt in a small bowl. Set aside.
In a large bowl, combine butter and granulated sugar. Beat on medium-low speed until thick. With the beater still running, add the eggs. Beat until combined.
Add the dry ingredients and mix on low speed. Mix until thick. Stop the mixer and add the milk and vanilla extract. Mix until a thick batter forms.
This recipe has not been tested with other flour blends. For the best results, use the flour recommended.