In a large bowl, whisk together the dry cookie bar ingredients.

Fold in wet ingredients then mix thoroughly until a dough batter forms.

Press the dough into a lined loaf pan, smoothing the surface with a spatula.

Freeze for 20-30 minutes allowing the batter tog firm.

Spread a generous layer of vanilla yogurt over the top.

Add your favorite sprinkles then freeze until frosting has thickened and firmed.

Cut into bars and enjoy!