Wash and peel hokkaido pumpkin, cut it into small pieces and boil until tender.
Let them cool slightly.
Beat eggs and brown sugar for several minutes until it becomes fluffy and lighter in color.
Feel free to use the whisk attachment on your stand mixer so you can let it whisk for a long time.
Mix the remaining dry ingredients and fold them into the batter with a spatula or wooden spoon along with the oil.
Mash the cooked hokkaido with a fork and fold it into the egg mixture.
Preheat the oven to 175 degrees Celsius (347 degrees Fahrenheit).
Pour the batter into a 20-23 cm springform pan and bake the cake for about 40 minutes.
In the meantime, make the cream cheese frosting by beating butter and cream cheese with a hand mixer.
Add lemon juice and powdered sugar and mix until the cream is smooth and combined.
It's a good idea to refrigerate the cream until the cake has cooled.
When the cake has completely cooled, spread the cream cheese frosting over the entire cake.
Draw a spider web in the frosting with a toothpick and food coloring paste.
If you don't have food coloring paste, you can use gravy browning.