/ck/ - Food & Cooking

Please help me, /ck/. I took three lemon blueberry cake layers out from the oven about an hour ago and they're now out of the pans and on a rack to cool.
I'm planning to do the assembly/frosting tomorrow and serving it tomorrow night (about 19 hours from now).

How the FUG am I supposed to store the cake layers in the meantime? Google is giving me mixed answers between it being ok to just leave them out or that they should be refrigerated due to the berries.

The full ingredient list is:
1 ¾ cup all purpose flour 235g, plus 1 tbsp to coat berries
1 ½ tsp baking powder
¼ tsp kosher salt
1 2/3 cup granulated sugar 245g
3/4 cup unsalted butter 170g, room temperature
3 egg whites room temperature
1/2 cup whole milk 120ml, room temperature
1/2 cup sour cream 120ml, room temperature
⅓ cup lemon juice 40g, fresh
1 tbsp lemon zest
3 tsp vanilla extract
1 1/3 cup blueberries 180g, fresh