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.)