Line a fine sieve with a paper towel, add the ricotta, and let it drain over a bowl for 20 minutes to remove excess liquid; skip this and the dip will turn watery.
Beat the drained ricotta and mascarpone together until silky with no grainy texture left, about 2 minutes.
Add the powdered sugar and cinnamon; beat until pale and fluffy.
Stir in the vanilla extract.
Fold in the mini chocolate chips by hand.
Cover and chill for 15 minutes.
Spoon into a serving bowl, scatter extra chocolate chips on top, and serve with graham crackers and strawberries.
Good to Know
Swap mascarpone for a second block of cream cheese in a pinch; the flavor is less rich but the texture still holds.