Step 1

Line a 18 x 13-inch half sheet pan with parchment paper.

Step 2

Combine flourbaking soda and salt in small bowl.

Step 3

Beat buttergranulated sugarbrown sugar and vanilla extract in large mixer bowl. Add eggsone at a timebeating well after each addition. Gradually beat in flour mixture. Stir in 1 cup morsels.

Step 4

Spoon dough onto prepared pan. With handsflatten dough making sure it covers the pan completely.

Step 5

Bake at 375° F for 20 to 25 minutes or until golden brown.

Step 6

Cool completely in pan on wire rack.

Step 7

Cut into rectangles (8 rows crosswise and 5 lengthwise). And then cut each rectangle in half lengthwise so they resemble fries.

Step 8

Working in batches (not all rectangles will fit on pan)place as many cookies as will fit on the pan and bake at 375° F for 5 to 7 minutes. This will get the cookies crisp enough to diplike biscotti.

Step 9

Cool to room temperature.

Step 10

Before servingmicrowave remaining morsels and evaporated milk in mediumdryuncoveredmicrowave-safe bowl on HIGH (100%) power for 1 minute; whisk until smooth. Place cookies on platter with melted chocolate for dipping. Serve with flakey sea salt.