Farmer uses the word "jelly" in her corn muffin recipe, which involves baking the muffins in a diamond-shaped rather than round cup-shaped pan (Jumbo pan). bake. With the invention of paper muffin molds, hard-to-clean iron "treasure" trays fell out of fashion and remain unavailable to this day. The invention of the non-stick pan made it possible to create muffins in a variety of intricate shapes (animals, holiday mascots, etc.), but round muffins remain the standard.

In the 1950s, several companies introduced packaged muffin products in the United States. After entering the 1960s, some people saw muffins as a business opportunity in the catering industry like donuts and tried chain operations. The emergence of the coffee shop-style restaurant chain industry has produced a large number of different varieties of muffins. As a result, regional food chains have been formed in the United States, such as The Pewter Pot located in Southern New England, but no store can cover the entire United States. On the other side of the ocean, the Australian Muffin Break chain, which provides American muffins, has expanded its business. To New Zealand and the UK.