Preheat the oven to 180 Celsius.
Line 9-10 inch cake pan with parchment paper, then sprays with nonstick cooking spray. Or with oil and flour.
In a stand mixer beat the butter and sugar for 2-3 minutes, and always scrape the bowl. Then add the egg one at a time and mix well then add the vanilla.
Then add the buttermilk and mix. Finally, add the oil and the red food color.
In another bowl sift the flour, baking soda, baking powder, and salt. Add flour mixture to liquids and mix for 2- 3 minutes or until all the ingredients are incorporated.
Bake the cake for 25-30 minutes.
Let it cool completely then cut into very small pieces.
For making the ice cream, in a saucepan pour the heavy cream and add the sugar, vanilla, and salt, stir on low heat until the mixture becomes to a boil like when bubbles on the edges. ( don’t let it boil).
Pour the mixture into the container and put it in the fridge to cool for 3-4 hours.
Whip the mixture for 3-4 minutes. Then add the red velvet cake and mix ( The amount of cake is up to you )
Transfer the ice cream mixture to an air-tight container and place it in the freezer for at least 8 hours.
Enjoy!