Chocolate Nutella Berry Pavlova

In case you've never heard of a pavlova, it's simply a meringue cake. It's light, airy, and extremely versatile. It's similar to a crunchy meringue cookie but also has that chewy-ness of a macaron. I love it because it's completely grain and gluten free, plus you can show off your mean piping skills. This is a semi-technical cake however because egg whites can be somewhat finicky.
Click to watch the video tutorial.
Pavlova Recipe:
4 egg whites
2 tbsp cocoa powder
1 tsp corn starch
1 cup sugar
1 tsp vinegar
1/4 tsp cream of tartar
1 tsp vanilla extract
1/2 C nutella
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Whipped Cream
1 c whipping cream (or heavy cream)
1 tbsp instant vanilla pudding
1 tbsp confectioners sugar