Vermont Maple Muffins

Step 1 -Adjust an oven rack to the center position, then preheat the oven to 400 degrees F.

Step 2 -Use the extra softened butter to generously grease the cups of a muffin pan.

Step 3 -In a large bowl, add the all-purpose flour, the whole-wheat flour, the baking powder, and the salt and whisk to combine.

Step 4 -In a medium bowl, add the maple syrup and the remaining 1 1/2 sticks of the melted butter.

Step 5 -Whisk the milk, the egg, and the egg yolk into the maple syrup mixture.

Step 6 -Add the maple syrup mixture to the flour mixture and whisk until it is just smooth.

Step 7 -Stir the walnuts into the muffin batter, then let it rest, about 5 minutes.

Step 8 -In batches if needed, spoon the batter into the cups of the prepared muffin pan so they are about 3/4 of the way full.

Step 9 -Bake the muffins, about 10 minutes.

Step 10 -Reduce the oven temperature to 375 degrees F, then bake the muffins until they are golden and a toothpick inserted into the center of one comes out clean, about 15 minutes.

Step 11 -Transfer the muffin pan to a wire rack and let the muffins cool, about 5 minutes.

Step 12 -Serve.