Homemade sweetened condensed milk traditionally requires ultra-low heat and up to 6 hours of constant stirring, but with a splash of heavy cream added to prevent scorching, I can crank up the heat and be done in 45 minutes. The result is thicker, creamier, and more luscious than anything from a can, with a rich dairy flavor and subtle notes of caramel. If you like chai tea, be sure to try the cinnamon-spiced variation.