Key Lime Pie (The Best)

Crust

• 1 1/4 cups (175 g) graham cracker crumbs
• 1/3 cup (75 g) butter, melted
• 1 tbsp sugar
• 1/8 tsp salt

Lime Cream

• 1 tsp cornstarch
• 3/4 cup (180 ml) juice from key limes (about 25) or regular limes (6 to 8) (see note)
• 1/4 cup (60 ml) sour cream
• 1 tbsp lime zest, plus more for serving
• 3 eggs
• 1 can (300 ml) sweetened condensed milk

Whipped Cream

• 1 cup (250 ml) 35% cream
• 2 tbsp sugar