Solidifying liquid amine oxide, betaine, and/or sultaine surfactants with a carrier

A method of preparing a solidified surfactant composition comprising:

• adding a liquid surfactant comprising one or more of an amine oxide, a betaine, and a sultaine, and a carrier comprising an alkaline earth metal sulfate to a drying device;
• wherein the drying device is a spray dryer;
• drying the liquid surfactant and carrier to form a solidified surfactant composition;
• wherein the liquid surfactant is solidified in the solidified surfactant composition;
• wherein the solidified surfactant composition has at least 60 wt-% active solidified surfactant and less than about 5 wt-% water;
• wherein the solidified surfactant composition is a free flowing powder;
• and
• wherein the carrier and the liquid surfactant are in a weight ratio of between 1:1 to about 1:30 by actives.