1 qt. whole milk
3/4 c. all-purpose flour
1/4 c. sugar
1/8 tsp. kosher salt
1/2 c. salted butter, plus more for serving
In a large saucepan over medium heat, heat milk to 195° F. Stir almost continuously so milk does not burn, scraping the bottom of the saucepan.
While milk is heating, whisk together flour, sugar, and salt in a small bowl. Set aside.
While milk is heating, melt butter in a small saucepan over medium heat. Turn off heat and hold until milk has reached 195° F.
Once milk temperature has reached 195° F, stir flour mixture into melted butter to form a thick paste.
Transfer to the heated milk and stir constantly until milk starts to boil. Turn heat down to low and let cook for 5 minutes more, stirring often. Remove saucepan from heat. Pour into individual bowls and serve with warm melted butter and cinnamon sugar (the more, the better!).