Butter Cake with Cookie Dough Frosting

I tried a new butter cake recipe and I must have did something wrong. When I took the cakes out from the oven they looked pretty good. I let the cakes cooled down and when I came back to check on the cakes, all of them collapsed and became all looking dense. Well, I still have finished up what I started and hope that cake will still taste OK.

I wanted to bake a butter cake, complimenting the cake with a cookie dough frosting so I thought if I used the butter cake recipe on it's fresh strawberry cake except that my cake is a plain butter cake without fresh strawberries.
I have both good and bad news. Let me first review the bad news, my cake didn't result same as that of my source, my cake was very dense. But all didn't go to waste, the good news is my tasters were quite delighted with taste and denseness, cake has the density of a cheesecake and the taste of cookie, perhaps this was from the frosting :)

Oh, here is the recipe on the cookie dough frosting. from this site.

This was a farewell cake to our friend that has lived in VA for the last 40+ years and has been faithful to our church. She is moving to Montana to be close with her daughter. I thought I decorated the cake with a few hearts to show how much she is loved and will be missed.

Here are the pictures of the cake.