Place the cookies into a large ziploc bag and break them up into chunks. Set aside.
In a medium bowl, whisk together the condensed milk, vanilla, and salt. Set aside.
In a large bowl, beat the cold heavy whipping cream until stiff peaks form, for about 3 minutes.
Fold 1 cup of the whipped cream into the condensed milk mixture, and then add all the lightened condensed milk mixture back into the whipped cream, folding until they are combined. Mix in the blue food coloring until the desired color is reached. Then fold in the cookies, leaving a few cookie pieces remaining to sprinkle on top.
Pour the mixture into a loaf pan or an 8x8/9x9 baking pan (you can line the pan with parchment paper first for easy clean-up). It will fill an entire loaf pan and you might have some extra depending on the size pan you use. Gently sprinkle the extra crumbled cookies on topPlace in the freezer for at least 5 hours to set, or overnight.
make sure you get stiff peaks- make sure you get stiff peaks when whipping up the heavy whipping cream. It should take you close to 3 minutes to achieve the stiff peaks like in the photos above.
use different cookies- Not a fan of oreos or chocolate chip cookies? You can substitute them for cookies you love, like nilla wafers, nutter butter, different flavored oreos, graham crackers, etc. If you're feeling wild, adding edible chocolate chip cookie dough bites would be amazing!
skip the blue- if food coloring isn't your thing (and neither is a blue tongue lol) then you can skip the blue coloring and leave it as is- after all, it's just vanilla ice cream. The blue is a fun twist though!
give your ice cream time to freeze- make sure you allow time for the ice cream to fully freeze. I recommend at least 5 hours, but typically I like to let mine sit in the freezer overnight to ensure it's good to go!