Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour two 8-inch round cake pans. Set aside.
Mix Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, and salt.
Cream Butter and Sugar: In a large mixing bowl, beat the butter and granulated sugar until fluffy (about 2-3 minutes). Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.
Combine Wet and Dry Ingredients: Gradually add the dry ingredients to the butter mixture, alternating with the milk. Start and end with the dry ingredients. Mix until just combined.
Bake Cakes: Divide the batter evenly between the prepared pans and smooth the tops. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Cool the cakes in the pans for 10 minutes, then transfer to a wire rack to cool completely.
Prepare Ricotta Filling: In a medium bowl, mix the ricotta cheese, powdered sugar, cinnamon, and mini chocolate chips until smooth. Set aside.
Assemble the Cake: Place one cake layer on a serving plate. Spread half of the ricotta mixture evenly on top. Place the second cake layer on top and spread the remaining ricotta mixture over the top.
Whip Cream: In a chilled bowl, whip the heavy cream until stiff peaks form.
Finish the Cake: Spread the whipped cream over the top and sides of the cake. Garnish with additional mini chocolate chips, if desired.
Chill and Serve: Chill the cake in the refrigerator for at least 1 hour before serving. Slice and enjoy!