Step 1

Beat cream cheese in a large bowl using a hand mixer or a stand mixer until smooth. Add powdered sugar; beat until smooth.

Step 2

Scrape down the sides of the bowl. Add 1 cup of the heavy cream and beat at low speed until smooth. Add the remaining 2 cups of cream; beat at medium to medium-high speed until soft peaks form, increasing speed as the mixture begins to thicken. Fold in the vanilla and lemon zest.

Step 3

Spoon 1/4 cup of the cream mixture into the bottom of a 9-by-9-inch pan or baking dish; spread into a thin, even layer.

Step 4

Top with graham crackers in a single, even layer, breaking them as needed to fit. Spread about 1 1/2 cups of the cream mixture over the graham crackers, smoothing into an even layer using a spoon or offset spatula. Top the cream mixture with an even layer of berries (about 1 1/2 cups). Sprinkle evenly with 1/4 cup almonds, if using.

Step 5

Repeat two more times with the remaining graham crackers, cream mixture, berries, and almonds.

Step 6

Cover with plastic wrap and refrigerate at least four hours and up to overnight.