Preheat oven to 425F, and line a baking sheet with a silicone mat or parchment paper.
Melt the butter in a saucepan on medium heat, stirring constantly, until the butter starts to brown, then remove from heat.
Whisk the flour and sugar in a bowl.
Add the butter, milk, and heavy whipping cream.
Mix until the ingredients come together.
Place on a floured surfance, and press into a 1" thick rectangle.
Cut out 6-8 portions, and place them on the baking sheet.
Cook until golden brown, 15-18 minutes.
Transfer to a cooling rack to cool completely.