Bake four kinds of pancakes on one sheet pan — no flipping required! Preheating the oven to 500ºF may seem scary, but it mimics the heat of a hot cast-iron griddle, giving you an instant rise and golden brown color.
Cook's NoteWhen measuring flour, we spoon into a dry measuring cup and level off the excess. (Scooping directly from the bag compacts the flour, resulting in dry baked goods.)
Position the oven rack in the center of the oven and preheat to 500ºF. Whisk the buttermilk, eggs, salt, vanilla and 1/3 cup granulated sugar together in a large bowl until completely combined. Whisk the flour, baking powder and baking soda together in another large bowl until completely combined. Fold the buttermilk mixture into the flour mixture with a silicone spatula until just combined (it’s OK if there are a few lumps). Reserve 2 tablespoons of batter in small bowl and set aside.
Brush 2 tablespoons butter on a 18-by-13-inch sheet pan and pour in the batter, using a spatula to smooth out the top. Tap the tray on the counter a few times to even out and flatten the batter.
Stir the warmed jam in a small bowl until pourable. Imagine the batter in the pan divided into four sections (2 across and 2 down). Dollop the jam, about 1 teaspoon at a time, over the surface of one section. (You want to see red dots of jam sitting on top of the batter.) Using a toothpick or small skewer, swirl the jam into the batter, making a marbled pattern. Top with sliced strawberries.
Sprinkle chocolate chips over a second section of the batter. Arrange banana slices in a herringbone pattern over a third section of the batter and sprinkle the fruit with the remaining 1 to 2 teaspoons granulated sugar.
Mix the brown sugar, cinnamon and reserved batter together in a small bowl, and dollop, about 1 teaspoon at a time, over the last section of the batter. (You want to see a lot of brown dots sitting on top of the batter.) Using another toothpick or small skewer, swirl the cinnamon mixture into the batter, making a marbled pattern.
Put the sheet pan in the oven and immediately reduce the temperature to 400ºF. Bake, rotating the sheet pan halfway through baking, until golden brown and a cake tester inserted into the center of the pancake comes out clean, 18 to 23 minutes.
Brush the pancake with the remaining 2 tablespoons butter and let cool 15 minutes before cutting. Stir together the confectioners’ sugar and 1 teaspoon water in a small bowl and drizzle over the cinnamon swirl quadrant.
Serve the pancakes with maple syrup and whipped cream.