In a sturdy saucepan, melt 1 tablespoon of brown sugar, 1 tablespoon of corn syrup, and 2 tablespoons of butter. Allow the mixture to reach a gentle boil and let it simmer for 1 minute. Next, incorporate 1 tablespoon of milk into the pan, creating a luscious blend. For added flavor and texture, if desired, you may introduce ¼ cup of chopped walnuts or the grated rind of half a lemon. Serve the delightful creation while it is still hot, indulging in its comforting richness.