Preheat your oven to 350°F (175°C) and prepare a baking dish by greasing it or lining it with parchment paper.
In a mixing bowl, combine the peanut butter, Greek yogurt, honey or maple syrup, egg, and vanilla extract. Mix until smooth and well blended.
In a separate bowl, whisk together the oat flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Fold in the chocolate chips until evenly distributed throughout the batter.
Pour the batter into the prepared baking dish and spread it out evenly.
Bake in the preheated oven for about 20-25 minutes, or until the edges are golden and a toothpick inserted in the center comes out clean.
Allow the bars to cool in the pan before cutting them into squares and serving.
