From The Joy of Muffins - The International Muffin Cook Book. This is what the intro says for this recipe. Rum-flavored desserts became popular in Denmark because of the Danish colonies in the West Indies. Danish rum-raisin muffins are inspired by romfromage and rombudding, rum cream and rum pudding. They are delicious for tea. Serve them with raspberry jam or whipped cream for real Danish appeal.