Line an 8-inch square pan with foil, extending it over the edges of the pan.
Lightly grease the pan.
In a large microwave-safe bowl, combine the frosting, white chocolate chips, and butter.
Microwave on high for 1 minute, stir, then continue microwaving at 30-second intervals until the chips are completely melted and smooth.
Stir in almond extract.
Fold in the crushed Nilla wafer cookies and 1/3 c. almonds until just blended.
Spread evenly into the prepared pan.
Sprinkle with remaining almonds.
Decorate with sprinkles, if desired.
Allow to set at room temperature for about a half hour, or for 10-15 minutes in the refrigerator.
Remove from pan by lifting the edges of the foil. Remove the foil.
Cut into squares, and DEVOUR!