01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with parchment paper.
02 - Combine flour, baking powder, baking soda, salt, and cinnamon in a large mixing bowl.
03 - In a separate bowl, whisk together eggs, maple syrup, brown sugar, melted butter, milk, bourbon, and vanilla until smooth.
04 - Pour wet ingredients into dry ingredients and gently mix until just combined. Avoid overmixing.
05 - Transfer batter to the prepared loaf pan and level the surface.
06 - Bake for 50 to 55 minutes until a toothpick inserted in the center emerges clean.
07 - Let loaf cool in the pan for 10 minutes, then place on a wire rack to cool fully.
08 - Slice and serve with maple syrup, powdered sugar, or toasted pecans or walnuts as desired.