Step 1

If you haven't already, grind the graham crackers in a food processor, blender or in a ziploc with a rolling pin.

Step 2

Heat the oven to 350, and grease a 9x13" baking dish.

Step 3

In a large bowl stir together the graham cracker crumbs, butter, sugar, and salt.

Step 4

Press the crust mixture into your greased baking dish and bake for 8-10 minutes, or until slightly golden.

Step 5

Remove from the oven and allow to cool on the counter while you prepare the filling.

Step 6

In a large mixing bowl, combine the sweetened condensed milk, and eggs.

Step 7

Add the lime juice and zest and whisk thoroughly.

Step 8

Fold in the blackberries, being careful not to break them.

Step 9

Pour into the baked crust and place in the oven.

Step 10

Bake for an additional 12-15 minutes.

Step 11

Remove from the oven and allow to cool completely and then refrigerate at least 30 minutes until set.