Preheat oven to 350-degrees F. Butter a pie plate; set aside.
In a large bowl, stir together sugar and flour. Stir in butter. The mixture will be somewhat crumbly.
Whisk the eggs and almond flavoring together, then stir into the sugar, flour and butter mixture.
Spread evenly in a lightly buttered pie plate. Sprinkle slivered almonds on top.
Bake for about 25-35 minutes until edges are light golden brown. Cut into wedges while still slightly warm. 16 wedges is a nice size for easy handling.
Store at room temperature, covered with plastic wrap.
