In a large bowl, whisk together the oil, buttermilk and 2/3 cup sugar.
1/2 cup (125ml) vegetable oil, 1/2 cup buttermilk, 2/3 cup (135g) granulated sugar
Whisk in the egg, and vanilla.
1 large egg, 1 tsp vanilla extract
Add the flour mixture to the wet ingredients and stir until just combined. Then fold in the peaches.
3 cups diced peaches
Transfer the batter to the prepared pan. Sprinkle the remaining 2 tablespoons of sugar on top.
2 Tbsp granulated sugar
Bake for 40-45 minutes or until a toothpick inserted into the center comes out clean.
Notes
Leftovers can be stored in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate the cake for up to 5 days.*To make homemade buttermilk - Add 1 tsp of vinegar or lemon juice to a measuring cup and fill it with milk of choice to make 1/2 cup. Stir and let stand for 5 minutes.