That sounds reasonable to me. Just raised my prices at the beginning of October. Some balk at it, others don't. Where are you located? I had someone call me this A.M. for a cake today. I have a full-tme job and this is done after work, so I had to turn her down. Explained that I needed 2 days notice.
For wedding cakes, I charge $1.50 per slice for simple BC and $2.00 per slice for more elaborate decorations. Fondant is more.
I think it really depends on what you do on the cake. I know I bought a simple mocha cake from a store for $20. It had coffee sponge cake and chocolate whipped cream. Nothing special about it, no big decorations- but I thought $20 was expensive for that cake.
I live in San Diego, so I understand that cost of living is higher here. If you do a good scratch cake with good decorations, then $30 should be good.
I think it depends on what your market will bear. Where I live, I charge $16 for a basic 2 layer cake with bc. A border and writing. I costed it out multiplied by 3 to come to that number. It seems like nothing and it isn't much, but no one where I live would pay $30 for a small cake. I charge extra for fondant and ganache.
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