01 - Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
02 - In a large bowl, whisk together sweet tea, melted butter, granulated sugar, eggs, and vanilla extract until thoroughly mixed.
03 - In a separate bowl, sift all-purpose flour, baking powder, baking soda, and salt to ensure an even texture.
04 - Gradually fold the dry ingredients into the sweet tea mixture, mixing only until just combined to maintain tenderness.
05 - Mix 1/2 cup granulated sugar with 2 teaspoons ground cinnamon in a small bowl for the filling.
06 - Scoop heaping tablespoons of dough, flatten slightly, sprinkle a pinch of cinnamon sugar in the center, then roll into a ball, sealing the filling inside.
07 - Place the balls on the prepared baking sheet, spacing them 2 inches apart. Bake for 16–18 minutes, until lightly golden and set.
08 - Cool for 5 minutes. While warm, roll each ball in melted butter, then thoroughly coat with the additional cinnamon sugar mixture.
09 - Serve the muffin balls warm or at room temperature for optimal texture.