• in a large pot, combine 10c old milk, 8T butter
• cook gently until butter melts
• whisk in 1-½c sugar, 1-2T salt until combined
• incorporate 1c flour, ½c cocoa powder, ½c dark cocoa powder
• whisk continuously over low heat 5-10 minutes or until flours are well combined
• when pudding seems to swell when not being mixed, but is not yet bubbling, add 5 egg yolks
• whisk continuously over low-med heat until pudding bubbles gently, 10-15 minutes
• remove from heat and blend in vanilla to taste
• strain into glass bowl, cover surface with plastic wrap, chill overnight