Strain the ricotta over a bowl with a fine mesh sieve lined with cheesecloth and refrigerate overnight.

Process the ricotta in a food processor until smooth.

Whip the heavy cream in a standing mixer until stiff peaks form and set aside.

Combine the ricotta, zests, vanilla, cinnamon, and powdered sugar in a standing mixer until combined.

Fold in the chocolate chips.

Gently fold the whipped cream into the cheese mixture.

Refrigerate the filling for 1 hour.

Refrigerate the filling for 2 hours before filling cakes.

Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius) and set oven rack to middle position.

Spray two loaf pans with cooking spray and dust with flour.

Whisk together cake flour, all-purpose flour, baking powder, cinnamon, salt, and cream of tartar in a medium bowl.

Heat milk and butter on low until butter is melted, then remove from heat and whisk in vanilla, orange zest, and lemon zest.

Separate egg whites and yolks.

Beat the egg whites in a standing mixer until foamy.

Gradually add cream of tartar and half of the sugar, continue to beat until soft peaks form.

Remove egg whites from mixer and set aside. Combine egg yolks and remaining sugar in the mixer and beat until light yellow and thick.

Combine egg whites to the yolks but do not mix.

Sprinkle the dry mixture over the egg whites and mix on low for about 10 seconds, or until blended, being careful not to overmix.

Create a well in the center of the batter and add the melted butter mixture.

Gently fold the mixture with a rubber spatula until thoroughly combined.

Fill the prepared loaf pans about 3/4 of the way high and place them on a sheet pan.

Bake for 25-30 minutes, rotating halfway, until golden and a toothpick comes out clean.

Let cool completely.

Remove the cakes from the pans.

Create puncture marks on the topside of the cake with a rounded piping tip to create space for the filling.

Fill the cakes with the ricotta mixture using a pastry bag fitted with a rounded tip until it billows out.

Flip the cakes upside down to resemble authentic twinkies.

Slice and serve.