Preheat the oven to 350 F. Grease and flour a bundt pan. If you are using a silicone bundt pan, don’t worry about greasing it. In a medium sized bowl, whisk together the flour, baking powder, salt and baking soda.
In the bowl of a stand mixer fitted with a paddle or whisk attachment, combine the sugar and butter. Cream together on medium high speed for 2 minutes.
Add in the egg whites and egg yolk and mix.
Add in the buttermilk, almond extract and vanilla and mix well.
Add the flour mixture into the wet mixture and mix just until the flour is incorporated.
Pour the cake batter into the prepared bundt pan and place into the oven to bake.
Bake for 1 hour or until a toothpick inserted comes out clean or with moist crumbs.
Remove from the oven and place onto a cooling rack to cool.
Once the cake is cool, remove from the bundt pan and place onto a cake stand or plate.
Make the glaze by whisking the ingredients in a small mixing bowl until a smooth glaze has formed.
Drizzle the glaze over the top of the cake. If you so desire, sprinkle some slivered almonds on top of the glaze. Slice, serve & enjoy!