Preheat your oven to 375°F (190°C) and line a muffin tin with paper liners—or just grease it if you’re rebellious like me.
In a large bowl, whisk together flour, baking powder, salt, cinnamon, and sugar.
In a separate bowl (or large measuring cup), mix the cream, melted butter, egg, and vanilla. Stir until well blended.
Pour the wet mixture into the dry ingredients and gently mix until just combined. Don’t overdo it unless you like tough muffins (you don’t).
Scoop the batter evenly into the muffin tin—about ¾ full. Sprinkle cinnamon sugar generously over each one. Be generous. Live a little.
Bake for 16-18 minutes, or until the tops are golden and a toothpick comes out clean (ish).
Cool for 5 minutes in the pan, then transfer to a wire rack. Or straight into your mouth. I’m not judging.