slowedly

adverb

In a slowed-down manner;  less quickly;  more slowly.

Examples:

With trying the following connoisseur's delight-augmenting knack, the finished flatbread cools quicker, releases more fragrances, and its crustified casing wilts slowedly:  Split the double-crusted disc horizontally into two thinner "semi-pancakes".  This can be conveniently done with two forks...  (Source: J∙ Okram - Bartonian Potato Pancakes  ●  Cooking Recipe.)