Creating these delightful Maple Donut Bars is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan.
2. Mix Dry Ingredients: In a large bowl, sift together the flour, sugar, baking powder, baking soda, and salt.
3. Combine Wet Ingredients: In another bowl, whisk together the melted butter, eggs, buttermilk, vanilla extract, and maple syrup.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix.
5. Pour Batter: Pour the batter into the prepared baking pan, spreading it evenly.
6. Bake: Place in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
7. Cool: Remove from the oven and allow the bars to cool in the pan for about 10-15 minutes.
8. Prepare Glaze: While cooling, mix the powdered sugar, maple syrup, and milk in a bowl until smooth.
9. Glaze Bars: Once the bars have cooled slightly, pour the glaze over the top and spread it evenly.
10. Slice and Serve: Allow the glaze to set for a few minutes, then slice the bars into squares.

By following these steps, you’ll create delicious Maple Donut Bars that are sure to impress anyone!