1-First Step: Mise en Place: Gather all ingredients. Measure 2 cups flour, 2 tsp cinnamon, 1 tsp baking soda, 1 tsp baking powder, ½ tsp salt, ¼ tsp nutmeg, and ¼ tsp cloves into one bowl. This dry mix sets the spiced base for your moist pumpkin sheet cake. In another bowl, crack 4 eggs and whisk with 2 cups sugar until smooth, about 2 minutes by hand.

2-Second Step: Combine Wet Ingredients: Add 1 cup vegetable oil and 15 oz pumpkin puree to the egg-sugar mixture. Whisk vigorously for 1-2 minutes until fully blended. The pumpkin adds natural tenderness, making this sheet cake stay moist for days. For vegan adaptations, use flax eggs here.

3-Third Step: Mix Dry and Wet: Pour wet ingredients into dry. Stir gently with a spatula until just combined, avoiding overmixing to keep the pumpkin cake light. Batter will be thick; spread evenly into the prepared sheet pan using an offset spatula. Tap pan lightly to release air bubbles.

4-Fourth Step: Bake the Cake: Bake at 350°F for 25-30 minutes. Test doneness with a toothpick in the center; it should come out clean or with moist crumbs. Cool in pan on a wire rack for 30 minutes, then fully on rack for 1 hour. This prevents soggy frosting.

5-Fifth Step: Prepare Cream Cheese Frosting: Beat 8 oz softened cream cheese and ½ cup butter until creamy, about 2 minutes. Gradually add 4 cups powdered sugar and 1 tsp vanilla, beating until fluffy. For dairy-free, swap with vegan alternatives. Spread generously over cooled cake.

6-Final Step: Finishing Touches and Serving: Chill frosted cake for 30 minutes to set. Cut into 24 squares. Garnish with chopped pecans or cinnamon dust if desired. Serve at room temp for best flavor. This easy pumpkin sheet cake shines at potlucks or family dinners. Total time: 45 minutes active, plus cooling. Store as noted below for peak freshness.