Transfer to a ramekin or small glass jar, cover and store in the refrigerator for up to 1 week.
Substitution and Sugar Chemistry
Replacing unsalted butter with salted butter alters the final sodium balance significantly because commercial salted dairy often contains approximately 1.5 to 2 percent salt by weight. Molasses introduces sucrose, glucose, and fructose alongside distinct organic acids that react with dairy solids. Using blackstrap instead of robust molasses injects intense bitterness and higher mineral content, completely overriding the mild sweetness standard dark variants provide. Butter must reach 65 degrees Fahrenheit before mixing to ensure the emulsion holds the dense liquid sugar without breaking.
Scaling Ratios Accurately
Multiplying this formulation for larger batches requires strict adherence to ratios rather than volume measurements. One stick of dairy weighs 113 grams, meaning a four-stick batch demands exactly 28 grams of molasses to maintain the identical flavor profile. Exceeding this proportion introduces excess moisture that separates from the fat phase during storage. Kitchen scales prevent density discrepancies that occur when measuring sticky syrups in standard volumetric spoons.
Timing and Temperature Control
Executing this method efficiently depends on thermal management of the ingredients. Softening dairy takes roughly 45 minutes at room temperature, provided the blocks are cut into smaller cubes to accelerate heat transfer. Blending must occur immediately after softening while the fat remains pliable enough to incorporate the syrup without mechanical separation. Storing the finished spread in an airtight glass jar protects the delicate dairy fats from absorbing unwanted refrigerator odors for up to seven days.