Box Mix Apple Spice Cake Cupcakes

Today I'm trying to salvage some more of this year's apple crop and so I hauled out the juicer extractor and am making apple juice with some of the windfalls. It's a bit dismaying how little juice and how much discarded pulp the extractor produces, so I'm also using some of that leftover pulp for another go at apple spice cake with a box mix. In hopes of being able to reproduce it later if it works well, here's this week's recipe

1 stick butter softened
1/4 cup sugar

cream these together in the mixer

3 eggs
1.5 cups apple sludge from the extractor (presumably apple sauce can be substituted)

add these to the mixer and blend in until smooth-ish (within reason, given apple chunks)

1 box yellow cake mix
A goodly amount of cinnamon
A lesser amount of nutmeg (ground)
A comparable (lesser) amount clove (also ground)

add dry ingredients to wet and mix until integrated

A sploosh of milk to get batter-like consistency - oh I dunno 1/2 a cup or so? Use judgment.

mix on medium high until more-or-less homogeneous batter-like consistency achieved

Spoon out into 24 cupcake papers and bake in muffin tins at 350F for 20 minutes

Find some way to keep the hell away from Kaylee until cool enough to frost.

Contemplate making a pie with the quart and a half of blackberries gleaned from the weedy bit on the slope. Or crisp? Should I make crisp instead?