DIY Crepe Cake

Recipe -

Crepe:
2 1/2 Cups of Milk
1/4 Cup Heavy Cream
3 TBSP of Butter
4 Large Eggs
2 Cups All-Purpose Flour
3 TBSP Sugar
1/4 TSP Salt

Pastry Cream:
2 Cups of Whole Milk
3/4 Cup of Sugar
1/4 TSP of Salt
1 TSP of Vanilla Extract
1/4 Cup Cornstarch
4 Large Egg Yolks
2 TBSP Butter