It takes about one hour approximately from ground cinnamon powder dissolving into sugar or other liquids like juice or milk or coffee or tea if mixed properly into cold liquid otherwise 10 minutes is sufficient time required for it dissolve into hot liquid like hot chocolate milk coffee etc.. Cinnamon powder if ground finely before mixing into cold liquid then 10 minutes time duration suffice while if mixing directly into hot liquid then about 1 hour duration required for cinnamon powder fully dissolve into warm or hot liquids like coffee milk etc.. In case cinnamon powder if added directly into warm liquids then half hour duration required so that cinnamon powder fully dissolves properly without creating any clumps in cold drinks such as juice milk tea etc.. To test if cinnamon powder has dissolved properly whether into cold liquid such as juice milk tea etc just use your thumb finger by touching cinnamon powder droplet with finger tip slowly rotate around finger tip until drops form around finger tip indicating fully dissolved into liquids such as milk juice tea etc..