Make Yogurt Sheet Pan Pancakes with Berries for an easy, berry-studded breakfast that yields 16 squares in about 32 minutes.
Move the oven rack to the middle position and preheat the oven to 425°F. Spray a rimmed 18" x 13" sheet pan lightly with cooking spray so the parchment will stick. Cut a piece of parchment about 16 x 20 inches to fully cover the pan bottom, lay it into the tray, and spray a little more oil on the parchment and around the sides—this simple prep makes the flip much cleaner and prevents sticking.
In a medium mixing bowl whisk together the all-purpose flour, white whole wheat flour, granulated sugar, baking powder, baking soda, and kosher salt until evenly combined and aerated. This step is about distributing the leaveners and creating a light base texture so the sheet batter bakes up tender and even.
In another medium bowl whisk together the plain yogurt, milk, water, eggs, melted cooled butter, and vanilla until smooth and homogenous. The yogurt creates a thick, tangy liquid body—keep the mixture glossy and well blended, but don’t worry about tiny air bubbles.
Pour the wet ingredients into the dry ingredients and whisk gently until just combined; the batter should be thick, with a few intentional lumps—over-mixing will make the finished pancakes tougher. Gently fold in 1½ cups of mixed berries so clusters remain intact and some berries are visibly embedded rather than crushed.
Pour the mixed batter into the prepared rimmed sheet pan and spread it evenly with an offset spatula, creating a thin, uniform layer. Tap the pan a couple of times on the counter to release air pockets and let a few berries bob to the surface; an offset spatula or flexible metal spatula can rest on the rim, lightly smeared with batter.

Bake the sheet for 15–17 minutes, rotating once halfway so the color is evenly golden. Let it cool in the pan for about five minutes, then place a large cutting board over the top and flip the whole sheet out onto the board; cut into 16 neat squares and serve immediately with optional fresh berries, a dusting of powdered sugar, little bowls of yogurt or maple syrup, or a drizzle of honey.