Since this is the last week of school, I decided to make something extra special for my kids’ school lunch treat. I had a bunch of fresh ripe berries from the farmer’s market so I decided to make some mixed berry crumb bars. The smell in my house while these bars baked was unbelievably wonderful and it literally made my mouth water. I am happy to report, my kids LOVE these bars.
Preheat oven to 375 degrees. Line a 9 x 9 pan with parchment, and spray with coconut oil spray.
Beat together in a bowl, the flour, sugar, baking powder, and salt. Add the butter, egg, egg yolk, vanilla, and half of the lemon zest. Beat on low speed until the butter is evenly distributed and all of the mixture is crumbly. Pour a bit more than half of the mixture into the bottom of the prepared pan. Using your hand, firmly push down to evenly press the dough into the pan.
Clean berries in a colander. Slice the strawberries and large blackberries in half. Combine all of the berries together in a bowl with the sugar, cornstarch, and remaining lemon zest; mix until well combined. Pour the berry filling over the crust, then crumble the remaining dough over the top of the berries.
Place into the oven and bake for approximately 40 minutes, until the top is light golden brown.