First I want to say that the microwave caramel recipe came from someone I follow on Foodbuzz. I printed the recipe and I thought I saved it to my recipe box, but now I can't find it. If the recipe is yours please let me know so I can give you credit. I added the Nutella and nuts to kick up the caramels.
1/2 cup butter
1/2 cup light corn syrup
1/2 cup light brown sugar
1/2 cup sugar
1/2 cup sweetened condensed milk
1 tsp vanilla
1/2 cup chopped nuts or small pecan halves
enough Nutella to cover the caramel
Melt butter in microwave safe bowl. Stir in syrups, brown and white sugars and condensed milk. Mix until sugar dissolves. Microwave on high for 3 1/2 minutes. Remove from microwave and stir in vanilla. Spray a dish (I used a 9 inch x 13 inch dish which made this caramels, use 8 x 8 if you want thick caramels) with nonstick spray. Pour caramel mixture in pan and refrigerate until set. Spread Nutella over the caramel and sprinkle with nuts or place pecan halves. Cut into 1inch squares. I did not spread Nutella over whole dish. I sprinkled sea salt on some and left some plain.