The amount of carrots you need to make a carrot cake differs from recipe to recipe and how large a cake you want to make. u003cbr/u003eu003cbr/u003eGenerally speaking, though, for a small-to-moderate-size carrot cake, you’re looking at something to the tune of 4 large carrots.u003cbr/u003eu003cbr/u003eYou may notice that healthier carrot cake recipes call for more carrots than more traditional ones. u003cbr/u003eu003cbr/u003eThis isn’t only to boost the nutritional value of the cake, but also because carrots are a wet ingredient that adds tons of moisture to the equation.