1. Preheat your oven to 375°F. Grease a 9×13 inch baking pan or line it with parchment paper for easy removal.
2. In a large bowl, whisk together the flour, sugar, baking powder, baking soda, salt, nutmeg, and cinnamon.
3. In a separate bowl, beat together the buttermilk, eggs, melted butter, and vanilla extract until well combined.
4. Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix as this can make the bars dense.
5. Pour the batter into the prepared pan, spreading it evenly. Bake for 18-20 minutes or until a toothpick inserted into the center comes out clean.
6. While the bars are baking, prepare the glaze. In a small saucepan over medium heat, melt the butter. Continue cooking until the butter turns a golden brown and has a nutty aroma.
7. Remove from heat and stir in the maple syrup and vanilla bean seeds. Gradually whisk in the confectioners’ sugar until smooth.
8. Once the donut bars have cooled slightly, pour the glaze over the top, spreading it evenly with a spatula.

One of the things I learned from my abuela is the importance of patience in the kitchen. Allowing the glaze to set before cutting the bars ensures a neat, beautiful finish.