Human: What are the best ways to make a homemade ice cream cake? Assistant: 

1. Start by gathering your ingredients.
2. Make a simple syrup by combining equal parts of water and sugar in a saucepan over medium heat.
3. In a large bowl, combine 1/2 cup of milk with 2 tablespoons of cornstarch.
4. Slowly add the hot simple syrup to the mixture while stirring continuously.
5. Add in any desired flavorings such as vanilla extract or cocoa powder.
6. Pour the custard into an 8x8 inch baking dish lined with parchment paper.
7. Place the ice cream cake in the freezer for about 4 hours until it is frozen solid.
8. Once frozen, remove from the pan and cut into squares.