Preheat oven to 350 degrees F. Lightly grease a 9x13-inch baking pan.
For the crust cream together the butter and brown sugar. Add the flour and mix until well blended. Spread the dough in the prepared pan. Bake the crust for 12-15 minutes.
Combine the eggs, corn syrup, granulated sugar, almond extract, butter, and cornstarch. Mix until uniform. Pour mixture over partially cooked crust. Sprinkle almonds and semi-sweet chocolate chips uniformly over the top of egg mixture and return to oven for 25-30 minutes until the center is set. Cool.
Heat maple spread or spiced rum butterscotch 20 seconds until slightly thinned. Drizzle over the top of the bars. Cut into bars and serve.