Chef Bobby's Apple Coffee Cake

Ingredients 4 ounce butter 2 eggs 1 cup sugar 1 vanilla bean 4 Fuji apples 1/2 cup flour 2 teaspoon baking powder 1/2 teaspoon kosher salt 1/2 cup milk, room temperature Step 1Heat oven to 350ºF. Grease a nine-inch circle pan with butter. Cut a circle of parchment paper to fit the bottom of the pan and place inside pan. Grease sides of pan and parchment round with butter. Step 2Melt butter in small saucepan. Set aside. Beat together eggs and half of sugar in a bowl. Continue to beat while slowly adding remaining sugar until thick — it should form a ribbon when dropped from spoon. Step 3Split vanilla bean in half lengthwise. Scrape seeds into the egg-sugar mixture and add pod to melted butter. Step 4Peel apples and cut straight down around the core into four big chunks. Discard the core then slice the apple pieces thinly. Step 5Remove vanilla pod from butter and discard. Stir butter into sugar-egg mixture. Combine flour, salt and baking powder, then stir into batter alternating with the milk. Stir in apples, coating every piece with batter. Pour batter into pan. Step 6Bake for 25 minutes, then rotate the pan. Bake for 25 to 30 minutes more, until cake pulls away from pan and is brown on top. Cool for at least 30 minutes, then cut into wedges sprinkling each with powdered sugar if desired.