In a large Dutch oven, pour oil to fill halfway, and heat over medium-high heat until a deep-fry thermometer registers 350°.
In a large bowl, whisk together flour, ¼ cup sugar, salt, and ¼ teaspoon cinnamon; whisk in buttermilk, egg, oil, and vanilla until a thick batter forms.
Gently pat strawberries dry with paper towels; gently fold into batter.
Working in batches, carefully drop batter by scant ¼ cupfuls into hot oil. Fry, turning occasionally, until golden brown, about 4 minutes. Remove using a slotted spoon, and let drain on paper towels.
In a medium bowl, whisk together remaining 1 cup sugar and remaining 1 teaspoon cinnamon; dredge warm fritters in cinnamon sugar to coat. Serve immediately.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/strawberry-fritters-2/