Step 1: Prepare the Cake Batter. Preheat oven to 375°F (190°C). Line a 10x15-inch jelly roll pan with parchment paper and grease the paper well. In a medium bowl, whisk together the flour, baking powder, baking soda, cinnamon, ginger, nutmeg, cloves, and salt. In a separate, larger bowl, beat the eggs and granulated sugar until thick and light in color. Mix in the canned pumpkin puree until fully incorporated. Gradually add the dry ingredients to the wet mixture, stirring gently until just combined (do not overmix; a few lumps are fine).
Step 2: Bake and Roll the Cake. Pour the batter evenly into the prepared pan, spreading it to the edges. Bake for 13-15 minutes, or until the cake springs back when lightly pressed. While the cake is baking, generously sprinkle a clean, lint-free kitchen towel with powdered sugar. Immediately upon removing the cake from the oven, invert it onto the sugar-dusted towel. Carefully peel off the parchment paper. Starting from a short end, roll the cake up tightly with the towel still inside, forming a spiral. Let it cool completely in this rolled-up position.
Step 3: Make the Filling. While the cake cools, prepare the cannoli filling. In a large bowl, combine the drained ricotta cheese, mascarpone cheese, powdered sugar, vanilla extract, and cinnamon. Beat until wonderfully smooth and creamy. Gently fold in the mini chocolate chips.
Step 4: Assemble and Chill. Once the cake roll is completely cool, carefully unroll it. Spread the luscious cannoli filling evenly over the cake, leaving a small border around the edges to prevent oozing. Gently re-roll the cake (without the towel), keeping it as snug as possible. Wrap the rolled cake tightly in plastic wrap. Refrigerate for at least one hour to allow the cake to firm up and flavors to meld beautifully. This is a fantastic make-ahead dessert.
Step 5: Garnish and Serve. When ready to serve, unwrap the cake roll. Give it a generous dusting of powdered sugar. Sprinkle with extra mini chocolate chips or chopped pistachios for garnish. Slice and serve immediately.