Sift together flour, salt, and baking soda in a medium bowl.
Beat sugar, butter, and shortening in a large bowl on medium speed with an electric mixer until smooth.
Add in egg, beating until well combined.
Beat in half and half, milk, buttermilk, and vanilla.
Add the dry mixture to the wet mixture. Mix briefly.
Fire up your waffle maker. When hot, give it a light coating of vegetable oil or cooking spray.
Add 1 cup batter to your hot waffle iron and let it cook until crispy and golden brown.