Sweet Potato Cobbler

Name: Sweet Potato Cobbler
Prep time: 15 min
Cook time: 1 h 15 min
Total time: 1 h 30 min
Cuisine: American, Southern
Ingredients: 1⅓ cups all-purpose flour; 2 Tbsp brown sugar; ½ tsp salt; ½ cup unsalted butter (cold); 2 Tbsp vodka (see note); 2-4 Tbsp cold water; 2 pounds sweet potatoes (~4 medium sweet potatoes); 1 cup granulated sugar; ½ cup brown sugar; 3 Tbsp all-purpose flour; 1 tsp vanilla extract; 1 tsp ground cinnamon; 1 tsp ground ginger; ½ tsp ground nutmeg; ¾ cup unsalted butter (cut into ½” cubes); 1 large egg yolk; 2 Tbsp coarse sugar (i.e. turbinado, sparkling, etc.)