Voy a batir los huevos mientras tú cortas el pan.

This is the very common Spanish future construction:

ir + a + infinitive

So:

• voy = I go / I am going
• a
• batir = to beat / to whisk

Together, voy a batir means I’m going to beat/whisk.

It works just like this in many sentences:

• Voy a comer = I’m going to eat
• Vamos a salir = We’re going to go out
• Va a llover = It’s going to rain

So in this sentence, voy a batir los huevos is not about physically going somewhere. It is the normal way to talk about a near or intended future action.

Batir usually means to beat, to whisk, or sometimes to stir vigorously, depending on context.

With huevos, it usually means:

• to beat the eggs
• to whisk the eggs

In cooking, English often prefers whisk if you are mixing eggs with a fork or whisk, but beat is also very common. Spanish uses batir naturally here.

Spanish often uses the definite article more than English does.

So:

• batir los huevos = literally to beat the eggs
• but in natural English we might simply say beat the eggs

Even when English would omit the, Spanish frequently keeps it, especially with everyday objects, food, body parts, and things that are understood from context.

Here, los huevos refers to the eggs involved in the cooking situation, so the article sounds natural.

Usually, no. Spanish often drops subject pronouns because the verb ending already shows who the subject is.

So both are possible:

• mientras cortas el pan
• mientras tú cortas el pan

Both mean while you cut the bread.

Including tú can add:

• emphasis
• contrast
• clarity

In this sentence, tú helps create a contrast:

• I will beat the eggs
• you cut the bread

So it sounds a bit like: I’ll beat the eggs while you cut the bread.

Because mientras can be followed by the indicative when the action is seen as real, habitual, or actually happening.

Here:

• mientras tú cortas el pan = while you cut / while you are cutting the bread

This is a real action happening at the same time, so the present indicative is natural.

Cortas is the tú form of cortar in the present indicative:

• yo corto
• tú cortas
• él/ella corta

You may see the subjunctive after mientras in other contexts, but not here.

Yes.

As a conjunction, mientras means while:

• Voy a batir los huevos mientras tú cortas el pan.

As an adverb, it can mean meanwhile / in the meantime:

• Yo preparo la mesa. Mientras, tú cocina.
  = I’ll set the table. Meanwhile, you cook.

In your sentence, it is clearly the conjunction while, linking two simultaneous actions.

It is mainly talking about the near future or an intended action.

• Voy a batir = I’m going to beat/whisk
• cortas is present tense, but after mientras it can refer to what happens at the same time in that situation

So the overall sense is:

I’m going to beat the eggs while you cut the bread.

Spanish often mixes a future expression in one clause and the present in another clause when the second action is understood as part of the same immediate plan.

Yes, you could say:

Voy a batir los huevos mientras tú estás cortando el pan.

That means something like:

I’m going to beat the eggs while you’re cutting the bread.

But in many cases, Spanish prefers the simpler present tense:

• mientras cortas el pan

The present tense already conveys the simultaneous action well, so estás cortando is not necessary unless you specifically want to stress the ongoing nature of the action.

Spanish normally does not use an extra helping verb like English do in this kind of sentence.

English uses auxiliaries a lot:

• I am going to...
• you do
• you are cutting

Spanish often expresses the idea directly in the main verb:

• cortas = you cut / you are cutting

So mientras tú cortas el pan is a complete and natural clause without any extra verb.

Yes, it can be changed.

This order is very natural:

• Voy a batir los huevos mientras tú cortas el pan.

But you could also say:

• Mientras tú cortas el pan, voy a batir los huevos.

Both are correct. The difference is mainly one of focus and style.

• Starting with Voy a batir... focuses first on what I’m going to do
• Starting with Mientras tú cortas... sets the time/background first

Spanish word order is flexible, though not completely free.

Pan generally means bread.

In Spain, depending on context, it may refer to:

• bread in general
• a loaf
• some bread for the meal
• bread rolls or table bread

In this sentence, el pan most naturally means the bread that is part of the meal or recipe. The article el suggests the bread is specific or understood from context.

Not by itself.

Batir los huevos means only to beat/whisk the eggs. That is one step in cooking, not the final dish.

If you wanted to say make scrambled eggs, you would normally say something like:

• hacer huevos revueltos

So in your sentence, the speaker is talking about a cooking action, not necessarily the final recipe.

It would be:

Voy a batir los huevos mientras cortas el pan.

This is probably the most neutral and common version in everyday Spanish, because the verb cortas already tells us the subject is you.

The version with tú is also correct, but it sounds slightly more emphatic or contrastive.