I've tested a few of the other copycat recipes out there, but the sauces were always made with a brown sugar base which didn't come close to the Applebees version. So I mixed and matched a few recipes and threw a few things together to come up with a light colored sauce.
1 c. cream
½ c. white chocolate chips
¼ c. granulated sugar
1/4 tsp. maple extract
1 c. sour cream
Combine cream, chips and sugar in a saucepan and cook, constantly stirring on medium heat.
About 1 minute after it is bubbly and thickened, remove from heat. Be careful not to burn the sugary sauce.
Add maple flavoring and sour cream and stir until combined.
Sauce will thicken more as it cools.
If you need a blondie recipe, you can find it here from my previous life as a food blogger.