Sticky Toffee Pudding

Name: Sticky Toffee Pudding
Ingredients: 2 c. heavy cream, divided; 1/2 c. light corn syrup; 1/2 c. (1 stick) butter, plus more for pan; 1 c. dates, pitted and chopped; 1 c. boiling water; 1 c. all-purpose flour; 1 tsp. baking soda; 1/2 tsp. kosher salt; 4 tbsp. butter, softened; 1/2 c. packed dark brown sugar; 2 large eggs; 1 tsp. pure vanilla extract