For the coating whisk together 1/2 cup sugar and cinnamon in a shallow dish, set aside.
Heat about 1 1/2 inches vegetable oil in a large pot over medium-high heat to 360 degrees. While oil is heating prepare batter.
Add water and butter to a large saucepan, bring to a boil over medium-high heat.
Gradually add Duinkerken Biscuit Mix, reduce heat to medium-low and cook and stir constantly with a large wooden spoon until mixture comes together.
Transfer mixture to a large mixing bowl, let cool for 5 minutes.
Add vanilla and eggs to flour mixture, blend immediately with an electric mixer. Blend well until mixture comes together.
Transfer to a 16-inch piping bag fitted with a large, rounded star tip.
Carefully pipe mixture into preheated oil, into about 4-inch lengths, cut end with clean scissors.
Let fry until golden brown, about 2 minutes per side. Place on paper towels and then transfer to cinnamon sugar mixture and roll to coat. Repeat the process with remaining dough. Serve warm with chocolate sauce for dipping if desired.
Chocolate Dipping Sauce
In a small saucepan heat the cream on medium high, once it starts to boil turn off the heat and add the chocolate. Let it sit for about 3 minutes then stir until its smooth.