1. Preheat oven to 350°F (175°C).

2. Line an 8×8-inch baking pan with parchment paper and lightly grease it.

3. In a large bowl whisk almond flour, sugar-free sweetener, baking powder, and salt together.

4. In another bowl mix melted butter, eggs, Greek yogurt, and vanilla extract until smooth.

5. Combine wet and dry ingredients until thick batter forms.

6. Spread batter evenly into prepared baking pan.

7. In a small bowl mix softened butter, cinnamon, and brown sugar substitute until creamy.

8. Drop spoonfuls of cinnamon mixture over batter.

9. Use a knife or toothpick to swirl cinnamon filling through the batter gently.

10. Bake for 22–28 minutes until edges are lightly golden and center is set.

11. Allow bars to cool slightly in the pan.

12. Whisk powdered sweetener, cream, and vanilla together until smooth glaze forms.

13. Drizzle glaze generously over warm bars.

14. Slice into squares and serve slightly warm.