Preheat oven to 400° line a heavy baking sheet with parchment paper

Combine the flour, brown sugar, baking soda, cream of tartar, and salt in a food processor. Pulse to combine (i dont have a food processor i used my kitchen aid and it worked fine)

Add the peanut butter by spoonfuls to the flour mixture. Pulse until the mixture is combines and looks like sand. Transfer to a mixing bowl and stir in the berries.

Stir in the yogurt and egg togrther in a small bowl and add to the flour mixture. Stir with a spoon until combined. Use your hands if necessary, to ensure that all of the flour is incorporated.

Transfer the dough to a lightly floured work surface and pat into a circle about 1 " thick. Cut the dough into 8 equal wedges. Arrange wedges on the baking sheet and bake for 15 minutes ornuntil lightly browned. Let cool slightly and serve warm.