Step 1: Preheat your oven to 350°F (175°C) for even baking.
Step 2: Line a muffin tin with parchment paper or muffin liners.
Step 3: In a large bowl, whisk together melted butter, maple syrup, Greek yogurt, eggs, and vanilla extract until smooth.
Step 4: In another bowl, sift together flour, baking powder, kosher salt, and ground vanilla bean powder.
Step 5: Gently fold the dry ingredients into the wet mixture with a rubber spatula, leaving some lumps.
Step 6: Fold in the chocolate chips evenly.
Step 7: Spoon the batter into the muffin tin, filling each cup about three-quarters full.
Step 8: Sprinkle granulated sugar and flaky sea salt on top.
Step 9: Bake for 18-22 minutes until a toothpick comes out clean.
Step 10: Allow to cool in the tin for 5 minutes, then transfer to a cooling rack.
