Step 1

Lightly butter a 9x13-inch baking dish.

Step 2

Prepare casserole: Prick each pancake half several times with a fork. Place in the prepared baking dish in 2 to 3 long rows, overlapping in a shingled formation.

Step 3

Whisk together eggs, heavy cream, milk, vanilla, cinnamon, and salt. Pour over the pancakes. Cover and refrigerate for 8 hours, to overnight.

Step 4

When ready to bake, preheat the oven to 350 degrees F (175 degrees C).

Step 5

Prepare topping: Combine pecans, flour, brown sugar, cinnamon, and salt in a medium bowl. Add butter and mix with a fork or your fingers until crumbly.

Step 6

Remove pancakes from the refrigerator and uncover. Sprinkle streusel topping evenly over the top.

Step 7

Bake in the preheated oven until golden brown and cooked throughout, about 55 minutes.