What blessing is to be recited over ice cream in a cone?
One is to recite a blessing of Mezonos over the cone and then Shehakol over the ice cream. If however one does not taste the cone at all and is simply using it to hold the ice cream then only a blessing of Shehakol is recited.
 See Piskeiy Teshuvos 212/14; Luach [Marlow] p. 164-165; Luach [Prus] p. 20
 Piskeiy Teshuvos 212/14 that when there is a large amount of filling one always recites both blessings; See 168/9; Seder 3/7 that one always says the blessing on the Mezonos. However that is referring to a case that they were baked together. In this case since the cone and filling are made separately, consequently they each receive their designated blessing as each one is not nullified to the other, as explained in 3/1 regarding when both are an Ikkur.
 168/9; See Luach [Marlow] p. 164-165; Luach [Prus] p. 20