Pre-heat oven to 350 degrees. Butter an 8 inch square pan.
Combine butter and sugar in mixing bowl; beat until light and fluffy. Add almonds; beat 1 minute. Add eggs one at a time mixing between each addition. Add baking powder and flavorings. Gently fold in flour; 1 tbsp at a time. Scrape batter into prepared pan.
Bake at 40-45 minutes until a wooden toothpick inserted comes out clean. Let cool completely. Sprinkle with powdered sugar, when cool.