Preheat oven to 350 degrees F.
In a medium bowl, whisk the flour, baking powder, baking soda and salt for 30 seconds. Set aside
In another bowl, add the buttermilk, maple syrup, vegetable oil and extracts (maple, almond, and vanilla). Set aside..
In the bowl of your mixer, add the butter and mix at medium speed until smooth.
Gradually add the brown and white sugar and continue to mix on medium speed for 3 to 5 minutes until lightened in color and fluffy.
Add the eggs one at a time mixing after each addition until the yellow of the yolk has blended.
With the mixer on low speed, alternately add the flour mixture and buttermilk mixture, beginning and ending with the dry ingredients (3 additions of dry ingredients and 2 of liquid). Mix just until incorporated.
Divide batter between the three cake pans, pouring the batter on top of the finely chopped almonds on the bottom of the pans.
Bake at 350 degrees for 22 - 25 minutes or until a toothpick inserted in the center comes out clean or with just few crumbs attached. Let cool 10 minutes and turn out.