Combine the graham cracker crumbs and cream cheese, press the mixture into the bottom of the small springform pan, and refrigerate until the base sets.
Mix the cream cheese, yogurt, sugar, vanilla extract, and gelatin powder together, gently fold in the whipped cream, and pour the cream over the chilled cake base. Refrigerate the cake for at least 2 hours.
Prepare the big cake base in the same way you did the mini cake base.
Heat the milk to 100°F and pour it into a bowl. Add the shredded Swiss cheese and stir until the cheese is completely melted. Add the sugar, vanilla extract, cream cheese, gelatin powder, and yellow food coloring and mix well. Gently fold in the whipped cream.
Pour about 7 oz of the big cake cream over the big cake base, smooth it out, and refrigerate for at least 30 minutes.
Remove the mini cake from its pan and place it in the center of the big cake. Pour the remaining big cake cream over the mini cake, smooth it out, and refrigerate for at least 12 hours.
Remove the cake from its pan the next day and smooth it out once more. Dip a melon baller in warm water and use it to gently carve out 'holes' to make the cake look like a piece of Swiss cheese.